scenario questions

An ISP engineer is troubleshooting an interdomain multicast deployment. A receiver in AS 65001 wants to receive a stream sourced in AS 65002. The RP in AS 65001 has no (S,G) state for the source, and the RP in AS 65002 is not sending any Source-Active messages. Both RPs are configured as MSDP peers over a working TCP session. Which statement explains why the RP in AS 65001 lacks source information?

Which TWO types of OSPF areas allow the generation of Type-7 LSAs? (Choose two)

You administer a Junos router that has two equal-cost paths toward the PIM rendezvous point for group 239.1.1.1. Users report intermittent multicast outages whenever the unicast route to the RP flaps. You want to eliminate the dependency on unicast reachability to the RP for this group. Which configuration accomplishes this?

You are configuring private VLANs (PVLANs) on a Juniper EX switch to isolate customer ports from one another while sharing a common gateway. Which VLAN type is configured to allow communication only with promiscuous ports?

Which TWO factors can cause an EVPN instance on a Junos device to fail in importing incoming Type-2 MAC/IP routes? (Choose two)

You are deploying an EVPN-VXLAN fabric on Juniper MX Series routers. Host A is attached to a leaf device and its MAC address is learned locally. You need to ensure that this MAC is advertised to all other leaf devices in the same EVPN instance so they can forward traffic to Host A without flooding. Which EVPN route type should you verify is being generated and advertised?

Which standard Junos forwarding class is reserved for control plane traffic such as routing protocols and management traffic?

Which TWO BGP attributes are classified as well-known mandatory attributes that must be recognized by all BGP implementations? (Choose TWO)

You are troubleshooting a scenario where multi-field classifiers and behavior aggregate classifiers are both configured on the same ingress interface. In what order does Junos process classification?

An engineer needs to ensure that a Junos router balances BGP traffic across multiple paths with unequal IGP costs. Which feature must be configured to achieve this?

An engineer is troubleshooting a newly configured EVPN-VXLAN multi-homed setup where the Designated Forwarder (DF) is constantly toggling between two PE routers. What is the most likely cause of this DF churn?

Which command allows an administrator to view the active BGP routes along with their associated communities on a Junos device?

Which TWO commands are used to troubleshoot OSPF issues on Junos devices? (Choose two)

Which THREE statements describe the behavior of critical authentication (fallback) when a RADIUS server becomes unreachable on an EX Series switch? (Choose three)

You are deploying a Junos EX Series switch in a campus network. Voice packets arrive untagged from IP phones on access ports, while a trunk uplink carries traffic already marked with DSCP values from the core. You need to ensure that all ingress traffic on the uplink is classified into forwarding classes based solely on the existing DSCP bits without inspecting Layer 3 or Layer 4 headers. Which classifier type should you apply to the uplink interface?

You are configuring an EVPN-VXLAN fabric on Juniper devices and need to enable ARP suppression to reduce broadcast traffic. Which statement correctly describes how ARP suppression works in this environment?

Which operational command is used to verify the operational status and peer state of MSDP sessions on a Junos device?

Which OSPFv3 LSA type is responsible for carrying IPv6 prefix information within the same area, replacing the role of Router and Network LSAs carrying IP addresses in OSPFv2?

An administrator implements LLDP-MED on an EX Series switch network. To prevent unauthorized devices from masquerading as IP phones and requesting voice VLAN access, which feature should be combined with LLDP-MED?

Which Junos command displays the link-state database for OSPFv2, showing router LSAs and network LSAs?

Which TWO statements describe the function and operation of a PIM Bootstrap Router (BSR)? (Choose two)

You are deploying 802.1X on an EX4300 access port facing a conference room. The security team wants to prevent a user from unplugging an authenticated IP phone and plugging in an unauthorized laptop on the same port. You configure MACsec on the port. Which statement describes the security benefit that MACsec provides in this scenario?

Which statement is true regarding the behavior of the supplicant mode 'single' on an EX Series switch port?

When configuring voice VLANs and PoE on an EX Series switch, which THREE benefits are achieved by implementing LLDP-MED alongside standard PoE? (Choose three.)

An enterprise network uses a BGP route reflector (RR) architecture where client routers reflect routes to each other. A non-client router sends a route with an Originator ID and Cluster List to the RR. How does the route reflector handle these attributes when reflecting the route to other clients?

An administrator wants to configure Candidate-RP (C-RP) advertisements using the Bootstrap Router (BSR) mechanism in PIM sparse-mode. Which hierarchy level in Junos is used to configure the local router as a Candidate-RP?

You need to configure a classifier that inspects the Multiprotocol Label Switching (MPLS) experimental (EXP) bits. Which classifier type must you specify?

An administrator is enabling PIM sparse-mode on a Junos router that connects to a Layer 2 switch carrying several user VLANs. Receivers on those VLANs need to join multicast groups, but the router is not seeing any IGMP membership reports from the hosts. PIM is enabled on the router's interface toward the switch. Which action is required on the router to receive IGMP reports?

In Junos CoS architecture, what role does a forwarding class play?

When applying a rewrite rule on an interface, you notice that packets are being remarked incorrectly. You realize that both a DSCP rewrite rule and an IEEE 802.1p rewrite rule are configured on the same physical interface. What is the rule regarding multiple rewrite rules on a single interface in Junos?

How do you examine the specific OSPF routing table entries learned via OSPF on a Junos device?

An engineer is configuring PIM sparse-mode in an enterprise network. Which TWO characteristics are true regarding PIM sparse-mode operation? (Choose two)

You are configuring MACsec (Media Access Control Security) on an EX Series switch interface to secure Layer 2 links between two enterprise buildings. Which requirement is mandatory for MACsec to establish a secure session successfully between the two switches?

Which Junos configuration command enables MD5 cryptographic authentication on an OSPFv2 interface?

An administrator needs to filter Type-3 LSAs entering an OSPF stub area on a Junos routing device. Which statement under the area hierarchy is required?

You want to configure voice VLAN functionality on a Juniper EX switch so that IP phones automatically place voice traffic into VLAN 50 while passing PC data through unchanged. Which feature should you configure?

You are configuring Ethernet switching on an EX4300 switch and need to implement storm control to prevent broadcast, multicast, and unknown unicast traffic from overwhelming access links. Where is storm-control applied in the Junos configuration hierarchy?

Which statement describes the function of a drop-profile in Junos CoS?

During BGP route resolution on Junos, an indirect next hop is encountered. What mechanism does Junos use to resolve this indirect next hop to a direct forwarding next hop?

You are configuring a BGP Route Reflector (RR) in a Junos environment. To prevent routing loops within the iBGP cluster, what mechanism does the route reflector use to track the path of reflected routes?

Which THREE of the following statements describe the behavior and purpose of EVPN Route Type 5 (IP Prefix Route)? (Choose three)

You are troubleshooting an OSPF network where a Juniper router is not installing a particular OSPF route into its routing table. The route is present in the OSPF link-state database as an external LSA, but it is not in the inet.0 table. You have verified that the route is not filtered by any policy. What is the most likely cause?

When designing an EVPN-VXLAN fabric with integrated routing and bridging (IRB), which THREE considerations are critical for proper inter-subnet forwarding across VTEPs? (Choose three)

You are troubleshooting an IP phone that is failing to discover its voice VLAN via LLDP-MED on an EX4600 switch. You issue the show lldp interface command and see that LLDP is transmitting properly, but the phone reports no voice VLAN TLV received. What is the most likely cause of this issue?

You are the network architect for a service provider that offers BGP/MPLS IP VPNs to enterprise customers. A customer reports that routes from one of its sites are being leaked into the global Internet table of a remote provider edge (PE) router. You have already verified that the VRF import policy on the remote PE is correct and that the route target (RT) communities are properly assigned. Which Junos configuration on the originating PE router is the most likely cause of the route leak?

You are configuring a Junos router where a customer wants assured forwarding for three classes of traffic: AF11, AF21, and AF31. Each class must receive its own bandwidth guarantee and its own congestion behaviour. You are defining the behavior aggregate classifier. Which configuration element maps the incoming DSCP values to the correct forwarding classes and loss priorities?

When configuring a hierarchical scheduler map on an MX Series router, what is the primary purpose of the aggregate level shaping?

You are enabling 802.1X on an EX Series switch. You want to allow a PC that does not support 802.1X to access the network after a user opens a web browser and authenticates. Which feature should you configure on the switch?

Which TWO operational commands are valid for troubleshooting VSTP on Juniper EX switches? (Choose two)

An engineer needs to verify which multicast groups have active receivers joined on an interface using IGMP. Which operational command should be used?

An enterprise design requires configuring an Anycast RP setup using two Junos routers to provide redundancy for PIM sparse-mode. Which mechanism is required to synchronize source state information between the two Anycast RPs within the same AS?

Which THREE actions occur during the BGP next-hop resolution process on a Junos device when evaluating an eBGP-learned route? (Choose THREE)

Which command allows an administrator to verify the active supplicant states and authentication status on a specific EX Series switch interface?

An administrator configures EVPN with VXLAN encapsulation and wants to ensure that interfaces assigned to bridge domains drop frames whose source MAC address is not learned or is unauthorized. Which feature should be enabled?

An enterprise network runs PIM sparse-mode with a static RP. A Junos router receives a PIM Register message from a directly connected first-hop router for a new multicast source. The router is the RP for that group. Which action does the RP take upon receiving the Register message?

What is the default authentication order when authentication is enabled on an EX Series switch interface without explicit ordering configuration?

A network administrator needs to verify the PoE status, power draw, and allocated class for all connected IP phones across all interfaces on an EX2300 switch. Which operational command should be used?

You are configuring OSPFv2 on a Junos device and need to inject default routes into an OSPF NSSA area. Which configuration command under protocols ospf area should be used?

An engineer is deploying VSTP (VLAN Spanning Tree Protocol) on a Juniper EX Series switch in a network that also includes RSTP bridges. The engineer wants to ensure that VSTP BPDUs are properly handled and that the network converges quickly. Which statement about VSTP operation is correct?

An administrator configures PoE management mode on an EX4300 switch to 'consumption'. An IP phone connects, but before booting up completely, the switch denies power. Upon investigation, you find that the switch's static power reservation table is maxed out. What is the reason for this behavior in consumption mode?

You are troubleshooting a CoS issue on a Juniper EX Series switch. You have configured a policer to limit traffic to 100 Mbps with a burst size of 10 KB. You notice that traffic occasionally exceeds 100 Mbps for short periods but is not being dropped. Which statement explains this behavior?

A network administrator needs to display the multicast routing table entries, including incoming interfaces and outgoing interface lists (OIL), on a Junos device. Which operational command should be used?

An administrator is configuring a Junos device to support IGMPv3 on user-facing VLAN interfaces. Which configuration statement enables IGMPv3 processing on interface irb.10?

An engineer configures a two-color policer on an MX router. What are the two states or outcomes for evaluated packets in a standard two-color policer?

Which TWO parameters can be configured within a Junos scheduler definition? (Choose two)

Which EVPN route type is responsible for advertising MAC addresses combined with IP addresses (MAC/IP Advertisement Route)?

You are analyzing BGP EVPN updates and observe an Extended Community attached to a Type-2 route containing a sequence number. What is the primary function of this MAC Mobility Extended Community?

An administrator is troubleshooting an MSDP deployment between two autonomous systems. Which THREE factors can cause an MSDP peer session to fail to establish? (Choose three)

Which TWO actions occur when an 802.1X supplicant fails authentication and a guest VLAN is configured on the EX Series switch port? (Choose two)

You are configuring an EVPN-VXLAN fabric with a distributed gateway (anycast gateway) to optimize routing for hosts in different subnets. You need to ensure that the distributed gateway functions correctly. Which TWO statements are true about the distributed gateway implementation on Juniper devices? (Choose two.)

You are configuring Class of Service on an MX Series router. You want to ensure that the best-effort forwarding class receives at least 10 Mbps of bandwidth during congestion on a 1 Gbps interface, but you also want to allow it to use additional bandwidth if other queues are idle. Which scheduler configuration should you apply?

Which TWO of the following statements regarding EVPN Route Type 1 (Ethernet Auto-Discovery Route) are correct? (Choose two)

You are troubleshooting an EVPN-VXLAN fabric where a host connected to a multi-homed Ethernet segment is not receiving traffic from a remote PE. The remote PE has learned the host's MAC address via EVPN Type 2 routes. You suspect an issue with the Designated Forwarder (DF) election. Which command would you use on the local PE to verify the DF election state for the Ethernet segment?

An EX4300 switch is configured with captive portal authentication. Unauthenticated users are successfully redirected when attempting HTTP traffic, but HTTPS traffic fails to redirect properly and instead shows a certificate warning or connection timeout in the user's browser. What is the fundamental reason for this behavior with standard captive portal implementations?

An enterprise network uses BGP route reflection. The design team has deployed two route reflectors in the same cluster for redundancy, with all client routers peering to both route reflectors. After a link failure, some clients receive duplicate route advertisements. Which BGP attribute is used to prevent routing loops within a route reflection cluster, and how does it function?

An administrator configures a scheduler map on a Junos MX Series router with three queues: best-effort with transmit-rate remainder, expedited-forwarding with a strict-high transmit rate, and assured-forwarding with a transmit rate of 30 percent. Users report that voice quality degrades whenever assured-forwarding traffic bursts, even though expedited-forwarding is marked strict-high. Which statement explains this behavior?

An administrator applies a DSCP rewrite rule to an SRX Series device interface that faces an untrusted WAN. The goal is to mark voice packets with EF (46) and best-effort traffic with 0 before they leave the device. After applying the rewrite rule, the administrator notices that some packets still leave with their original DSCP values. Which statement explains the most likely cause?

Which TWO statements are correct regarding the behavior and configuration of multi-supplicant mode on EX Series switches? (Choose two)

You are redistributing BGP routes into OSPF on an MX Series router. By default, what metric type and cost are assigned to these redistributed routes when they enter the OSPF domain?

You are configuring RSTP on a Juniper EX Series switch. You need to ensure that the switch can quickly converge in case of a link failure. Which two statements are correct about RSTP edge ports and their configuration? (Choose two.)

In a Juniper Virtual Chassis scaling deployment comprising 10 EX4600 switches, how are control and management planes structured across member switches to maintain high availability and failover resilience?

Which TWO statements are correct regarding OSPF NSSA (Not-So-Stubby Area) behavior and configuration in Junos OS? (Choose two)

Which Junos configuration hierarchy is used to define a BGP peer group to simplify neighbor configurations?

An EX Series switch is configured with 802.1X and MAC RADIUS. A client device connects that does not support 802.1X. The switch attempts 802.1X, times out, and successfully falls back to MAC RADIUS. However, the administrator notices a significant delay (several seconds) before the MAC RADIUS request is sent to the server. What parameter should be tuned to reduce this delay?

Which TWO statements describe the characteristics of Random Early Detection (RED) and drop profiles in Junos? (Choose two)

You are configuring OSPFv3 on a Junos router and need to enable it on an interface that has IPv6 enabled. Which configuration statement is required to activate OSPFv3 on that interface?

A Junos router is the last-hop router for receivers in VLAN 100. The receivers use IGMPv3 and request group 239.5.5.5 from source 10.10.10.10 only. The router has a PIM sparse-mode shared tree (*,G) toward the RP, but traffic from 10.10.10.10 is not being delivered to the receivers. The unicast route to 10.10.10.10 points out a different interface than the one toward the RP. Which action resolves the problem?

You are configuring an EX Series switch to support IP phones that require both data and voice VLAN segregation on a single access port. You implement an access port configured with a voice VLAN. Which underlying Junos mechanism allows the switch to process untagged data traffic into the native/access VLAN and tagged voice traffic into the voice VLAN simultaneously?

An engineer is troubleshooting a BGP route reflection topology where a non-client IBGP peer sends a route to a route reflector. Will the route reflector reflect this route to other non-client IBGP peers?

An engineer needs to verify the Rendezvous Point (RP) currently learned via the Bootstrap Router (BSR) mechanism on a Junos device. Which operational command should be used?

Which command allows an operator to view the local and remote MAC addresses learned via EVPN control plane and data plane across all bridge domains on an MX Series router?

A network engineer notices that on a Junos EX Series switch, the voice queue is configured with strict-high priority, but during periods of congestion, data traffic is being dropped while voice traffic is unaffected. The engineer wants to ensure that voice traffic is not only prioritized but also limited so it cannot consume all interface bandwidth. Which scheduler property should be added to the voice queue to cap its maximum transmission rate?

Which THREE types of classifiers are natively supported in Junos Class of Service? (Choose three)

You are configuring a Junos SRX Series device to protect the control plane from a flood of BGP keepalives. You want to police traffic destined to the Routing Engine and apply a rate limit that drops excess packets while allowing normal protocol operation. Which CoS mechanism should you use?

An administrator is deploying EVPN multi-homing with all-active mode on an MX Series router. Which configuration element uniquely identifies the provider edge (PE) router's attachment circuit to an Ethernet segment?

You are configuring MAC limiting on an EX Series switch interface to restrict the maximum number of learned MAC addresses to 10. What happens when the 11th unique MAC address attempts to communicate through the interface?

What is the default OSPF reference bandwidth in Junos OS?

Which LLDP TLV (Type-Length-Value) is mandatory for LLDP-MED operation and is used to distinguish media endpoint devices from standard network switches and routers?

You are deploying a Juniper EX Series switch as an access layer device in a campus network. The uplink port ge-0/0/1 connects to a distribution switch and is expected to carry traffic for VLANs 10, 20, and 30. You want to prevent the access switch from becoming the root bridge for any of these VLANs and ensure that the uplink is preferred for forwarding. Which configuration should you apply on the access switch?

Which THREE configuration tasks are required when implementing OSPFv3 on Junos devices? (Choose three)

A Junos router connects to a Layer 2 switch that has multiple receivers on VLAN 200. The switch is not running PIM, and the router is the only multicast router on the segment. You want the router to send IGMP general queries on the VLAN 200 interface and track receiver group memberships. Which configuration is required?

Which THREE features or protocols are used in Juniper enterprise switching environments to prevent Layer 2 bridging loops while avoiding traditional Spanning Tree blocking ports? (Choose three)

An administrator is configuring IGMP snooping on an EX Series switch. Which TWO benefits does IGMP snooping provide in a switched Ethernet environment? (Choose two)

You are troubleshooting an EVPN-VXLAN fabric where a host behind Leaf 1 is unable to communicate with a host behind Leaf 2, even though both hosts are in the same VLAN and EVPN instance. You verify that Type 2 routes are being exchanged, but traffic is not forwarded. You suspect an issue with the VXLAN tunnel. Which Junos command would you use to check the status of the VXLAN tunnel interface and its associated VTEP?

You need to modify the priority of a Junos OSPF interface to ensure it becomes the designated router (DR). Which command accomplishes this?

What does the LLDP-MED acronym stand for in the context of enterprise networking and IP telephony?

A network administrator is configuring an enterprise router to join the Source-Specific Multicast (SSM) range. According to RFC standards, what is the standard IPv4 address block reserved for SSM?

Which statement correctly describes the function of an OSPF Stub Area?

An administrator implements MSTP (Multiple Spanning Tree Protocol) in a large data center using Juniper switches. Region boundaries must be maintained strictly. Which three parameters must match identically across all switches for them to be considered part of the same MST region?

You want to tag specific BGP routes with a community value using a Junos policy framework. Which configuration snippet correctly defines a community named 'CUSTOM-COMM' with value 65000:100?

Which specific EVPN route type is responsible for carrying IP prefix routes, often used for inter-subnet forwarding in an IP-VRF-to-EVPN integration scenario?

Which Junos configuration hierarchy is used to disable the generation of OSPF Type-7 to Type-5 LSA translation on an NSSA Area Border Router (ABR)?

An engineer is deploying PIM sparse-mode with anycast RP using two Junos routers that share the loopback address 10.0.0.1/32. Both routers are configured as static RPs for all groups and as MSDP peers with each other using their unique loopback addresses. Receivers attached to Router A join a group whose source is registered with Router B. Traffic initially flows, but after Router B reloads, receivers lose the stream even though Router A still has the anycast RP address reachable. Which mechanism is responsible for restoring source information to Router A?

You are implementing MSTP on a network of Juniper EX Series switches. You need to ensure that the MSTP region is correctly configured and that VLANs are mapped to the appropriate MSTIs. Which two statements are correct about MSTP configuration on Juniper EX switches? (Choose two.)

You are troubleshooting an EX Series switch where 802.1X authentication is failing for all users. The RADIUS server is reachable and the shared secret matches. Users report that authentication never completes and the switch logs show EAPOL exchanges starting but no Access-Request being sent. Which Junos command should you use to view the current 802.1X authentication state and counters on the interface?

Which THREE requirements must be met for an IP phone to successfully discover and use a voice VLAN configured via LLDP-MED on an EX Series switch? (Choose three)

You are configuring an EX Series switch to authenticate users via 802.1X. The RADIUS server returns a Filter-Id attribute of 'student-acl' in the Access-Accept. You want the switch to apply a firewall filter named 'student-acl' to the authenticated user's traffic. Which configuration is required on the switch?

What is the primary function of the RADIUS server attribute 'Tunnel-Medium-Type' (Attribute 65) when received during an 802.1X authentication exchange on an EX Series switch?

When designing a BGP confederation architecture, which TWO rules govern how sub-AS numbers and attributes behave across confederation boundaries? (Choose two)

Which TWO parameters are part of the standard MSTP configuration digest computed across switches in an MST region? (Choose two)

Which TWO actions can be performed using Junos BGP routing policies? (Choose two)

You manage a Juniper Networks enterprise network using OSPF. Router R1 and Router R2 are connected via a point-to-point link. R1 is configured with the interface ge-0/0/0.0 in area 0 with a hello interval of 10 seconds and a dead interval of 40 seconds. R2 has the same interface in area 0 but with a hello interval of 30 seconds and a dead interval of 120 seconds. After configuration, the OSPF adjacency does not form. Which action will resolve the issue?

You are configuring a Juniper EX Series switch to prevent loops in a VSTP environment. An access port connected to an end-user device is receiving BPDUs from an unauthorized switch. You want to automatically disable the port if BPDUs are received. Which feature should you enable on the access port?

An operator configures a BGP routing policy to modify the Local Preference attribute. Under which BGP neighbor relationship type can Local Preference be advertised and evaluated?

An administrator is configuring BGP multipath on a Junos router. The router has two BGP paths to the same destination: one with a MED of 100 and another with a MED of 200. Both paths are from the same neighboring AS. The administrator wants both paths to be installed in the forwarding table for load balancing. Which configuration is required?

Which TWO actions can be triggered when a MAC address limit is exceeded on a Juniper switch interface configured with MAC limiting? (Choose two)

You are deploying an EVPN-VXLAN fabric on Juniper switches with a multi-homed server connected to two leaf switches in an all-active configuration. The server's MAC address is learned locally on both leaf switches. Which mechanism ensures that only one leaf switch forwards BUM traffic to the server, while both can forward known unicast traffic?

Which THREE types of LSAs are blocked from entering an OSPF Totally Stubby Area? (Choose three)

You are tuning an egress interface on a Junos device for a service provider environment. You have configured three drop profiles and applied them to a scheduler map. You need to verify that the weighted random early detection (WRED) behaviour is operating as intended under congestion. Which TWO statements correctly describe how Junos implements drop profiles and WRED? (Choose two.)

What is the primary function of a behavior aggregate (BA) classifier in Junos CoS?

An engineer wants to configure a Junos router to act as a Bootstrap Router (BSR) for PIM sparse-mode. Which configuration hierarchy is used to enable the BSR function?

Which TWO statements are correct regarding the behavior of policers in Junos? (Choose two)

When deploying IP phones that utilize a voice VLAN on EX Series access ports, which THREE characteristics or configurations typically apply to this design? (Choose three.)

When configuring OSPF sham-links in Junos to support MPLS VPN back-door links, which TWO characteristics apply? (Choose two)

You want to map three loss priorities (low, medium-low, high) to different drop profiles within a specific forwarding class. Which statement should you use inside the scheduler configuration?

You are configuring a Juniper EX Series switch to support a Layer 2 network with multiple VLANs. You want to use RSTP for faster convergence but need to ensure that each VLAN has its own spanning-tree instance. Which feature should you enable?

An enterprise network administrator needs to configure 802.1X authentication on EX Series switches. Which statement is correct regarding the default behavior of the supplicant timeout timer?

Which TWO statements describe the behavior of VSTP (VLAN Spanning Tree Protocol) on Juniper EX Series switches? (Choose two)

An enterprise WAN edge router running Junos OS has a single 1 Gbps uplink. The design requires that when total egress congestion occurs, the queue carrying business-critical database replication traffic must be guaranteed a minimum of 400 Mbps, while the queue carrying guest internet traffic must never consume more than 200 Mbps even if bandwidth is idle. Which CoS configuration accomplishes this requirement?

Which configuration stanza is used to define custom forwarding classes in Junos?

When configuring advanced Layer 2 tunneling (Q-in-Q) on Juniper EX Series switches, which THREE statements are correct regarding VLAN stacking behavior and limitations? (Choose three)

A network engineer is configuring class of service on a Junos switch and wants to guarantee that the network control traffic forwarding class always has bandwidth available for routing protocol updates, even during heavy data congestion. The engineer also wants to ensure that this class is not starved by other queues. Which scheduler configuration should the engineer apply to the network control forwarding class?

Which TWO actions can be performed by an OSPF routing policy export filter when redistributing routes into OSPF? (Choose two)

You are configuring a Juniper EX Series switch to support a VoIP deployment. You want to ensure that voice traffic from IP phones is placed in VLAN 100 and data traffic in VLAN 200, with the phone tagging voice packets with 802.1p priority 5. Which feature should you configure?

Which IPv4 multicast address range is designated for Source-Specific Multicast (SSM) operations according to IANA standards?

Which BGP attribute is used to prevent routing loops in a BGP confederation?

Which TWO statements are correct regarding captive portal redirection behavior on EX Series switches? (Choose two)

Which THREE mechanisms are utilized by Junos to protect OSPF routing operations and control plane resources? (Choose three)

An enterprise design uses PIM sparse-mode with a BSR. An engineer notices that the router has successfully elected a BSR, but no Candidate-RP messages are being processed. Which operational command should the engineer use to verify the BSR candidate information and elected BSR address on the router?

You are deploying IP phones on an EX4300 switch. The phones require PoE+ (802.3at) and must be allocated power based on their actual consumption rather than a fixed class. Which PoE management mode should you configure on the switch?

An enterprise network engineer is designing a redundant Layer 2 topology with MSTP across Juniper EX switches. Two switches have identical bridge priorities and MAC addresses that result in a tie for regional root. How does MSTP deterministically break the tie to select the regional root bridge?

You are configuring an EVPN-VXLAN fabric on Juniper switches. A leaf switch needs to advertise its local VXLAN Tunnel Endpoint (VTEP) address to remote VTEPs so they can establish VXLAN tunnels. Which EVPN route type is used to advertise the VTEP IP address and support BUM traffic replication?

When designing advanced enterprise campus VLAN architectures with Juniper EX Series switches, which TWO considerations are critical for large-scale Layer 2 domains? (Choose two)

Which statement accurately describes the function of the 'server-timeout' setting within a Juniper access profile?

An administrator needs to configure PoE power management on an EX3400 switch to prioritize port ge-0/0/0 for a critical emergency IP phone. Which statement correctly describes the default PoE priority behavior on Junos EX switches if no explicit priority is configured?

You are setting up a new EVPN-VXLAN fabric on Juniper switches. You need to configure the BGP session between two PE routers to exchange EVPN routes. Which BGP configuration is required to enable the EVPN address family on the session?

You are troubleshooting an EVPN-VXLAN network where a Juniper MX Series router is acting as a PE. You notice that traffic from a local host to a remote host is being dropped, even though the remote host's MAC address is present in the EVPN database. The BGP EVPN session is up, and Type-2 routes are exchanged. Which of the following is the most likely cause?

Which command verifies the OSPF neighbor states and adjacency progress on a Junos device?

An administrator wants to configure an MSDP peer relationship on a Junos device and ensure that the MD5 password authentication is applied to the TCP session. Where is the MD5 authentication key configured for an MSDP peer?

You are configuring captive portal on an EX Series switch. Users must be redirected to an external web server for authentication. You have configured the captive portal profile with the redirect URL. However, users are not being redirected and can access the Internet without authentication. Which configuration issue is most likely?

An engineer is troubleshooting a multicast forwarding issue where data from a specific source is not reaching receivers in a remote PIM sparse-mode domain. Which THREE operational commands and diagnostic steps should be used to verify the multicast forwarding state and RPF path on a Junos router? (Choose three)

You are troubleshooting a power budget shortfall on an EX4300 switch where multiple PoE devices are failing to power up. Which TWO actions can you take to resolve or mitigate this power deficit? (Choose two.)

You are designing an EVPN network with active-active multi-homing. A host sends traffic to a multi-homed PE. The PE receives the traffic on a designated link. How does EVPN suppress unnecessary flooding across the core for unknown unicast traffic originating from a multi-homed site?

You are troubleshooting an OSPF adjacency between two Juniper Networks routers on a broadcast Ethernet segment. The routers are in the same area and have matching hello and dead intervals. The adjacency remains in ExStart state. Which OSPF parameter mismatch is the most likely cause?

Which TWO statements are correct regarding IGMP version 2 (IGMPv2) features compared to IGMPv1? (Choose two)

An enterprise network uses MBGP (Multicast BGP) alongside PIM sparse-mode. Which THREE statements accurately describe the function of MBGP in a multicast environment? (Choose three)

An engineer is verifying MAC learning behavior in an EVPN instance. A remote host's MAC address is learned via BGP Type 2 routes, but when the local host sends traffic to it, the packet drops. The engineer runs 'show route table bgp.evpn.0' and sees the route. What is the most likely reason the packet is dropping in the data plane?

You are deploying 802.1X on an EX Series switch and want to ensure that when a supplicant fails authentication, it is placed into a VLAN that provides limited access to a remediation server. Which TWO Junos configuration elements are required to support this behavior? (Choose two.)

Which THREE methods are valid for marking packet headers using CoS rewrite rules in Junos? (Choose three)

Which TWO security features can be configured on Juniper EX switches to prevent DHCP spoofing and ARP poisoning attacks on Layer 2 access ports? (Choose two)

Which command displays the configured scheduler maps and their association with forwarding classes on a Junos device?

Which THREE parameters are typically included or evaluated when configuring and verifying BGP EVPN peer sessions on Junos OS devices? (Choose three)

An engineer notices that a Junos device is not installing a BGP route into the forwarding table because the BGP next hop is unresolved. Which tool or command can be used to troubleshoot how the BGP next hop is being resolved in the Junos routing table?

An administrator applies a policy containing 'as-path-prepend "65001 65001"' to outbound BGP updates sent to an external provider. What is the primary objective of this configuration?

An administrator is troubleshooting a Juniper EX Series switch where an IP phone connected to ge-0/0/10 is not receiving PoE power. The switch is an EX4300 with PoE+ capable ports. The administrator runs 'show poe interface ge-0/0/10' and sees 'Status: Disabled'. The interface is administratively up and LLDP is operational. What is the most likely cause?

You are configuring Q-in-Q tunneling on an MX Series router where customer frames arrive with VLAN tag 100, and you need to encapsulate them with a service provider outer VLAN tag 3000 using 'vlan-map'. Where is the VLAN map applied?

When configuring a BGP confederation, how are external peers outside the confederation affected by the internal sub-AS structure?

An engineer needs to view the MSDP Source-Active (SA) cache on a Junos router to verify which sources are currently active across different PIM domains. Which operational command should be executed?

A network administrator is configuring CoS on a Junos EX Series switch and wants to verify the mapping between forwarding classes and queues as currently applied to a specific interface. Which operational command should the administrator use to display the forwarding class to queue mapping along with scheduler and classifier details for a given interface?

Which EVPN route type is responsible for establishing ingress replication lists for Broadcast, Unknown Unicast, and Multicast (BUM) traffic?

A Junos router receives a BGP route containing multiple extended and large communities. The administrator writes a routing policy to filter routes based on large communities. Which format is used to define a large community in Junos policy-options?

Which TWO options are valid configurable parameters under an access profile in Junos OS? (Choose two)

Which BGP community is a well-known transitive community used to prevent a route from being advertised outside of a local autonomous system?

You want to change the OSPF reference bandwidth globally on a Junos routing device to accurately calculate costs for high-speed interfaces. Where is this configured?

Which TWO statements are true regarding traffic shapers versus policers in Junos? (Choose two)

An enterprise network uses Q-in-Q tunneling over an MX Series provider network. Customer BPDUs must pass transparently across the provider core without being processed by the provider's own VSTP/MSTP instances. Which feature must be enabled on the provider switch access ports to achieve this?

An enterprise network uses multiple routing instances with PIM sparse-mode. An engineer needs to configure Inter-AS multicast routing using MSDP. Which component is required to establish MSDP peering across different autonomous systems where BGP is also running?

You are configuring OSPF on a Juniper Networks router. You want to influence the DR/BDR election on a broadcast segment so that a specific router becomes the DR. Which configuration statement should you apply to the interface?

An administrator implements BGP entropy labels and path load balancing on a Junos routing platform. During packet forwarding for a BGP-learned IPv4 prefix with multiple equal-cost paths, how does Junos determine the output interface when hash-based load balancing is active?

When configuring advanced Q-in-Q tunneling on Juniper MX Series routers, which THREE encapsulation or tagging parameters must be correctly aligned between the customer edge and provider edge interfaces? (Choose three)

An engineer is configuring a QinQ tunnel where the service provider bridge needs to transparently carry customer control traffic (like STP BPDUs) through the core without processing them. What feature must be enabled on the provider edge access ports?

Which command is used to verify the operational state of forwarding classes and their assigned queues on a specific interface on Junos?

In a BGP confederation setup, two member ASNs (65001 and 65002) belong to a larger confederation AS (65100). When routes are advertised between these two member ASs, how is the AS path attribute handled?

Which RADIUS attribute is commonly used to assign a specific session timeout value to an 802.1X authenticated client on an EX Series switch?

An enterprise network runs PIM sparse-mode with a static RP configured on all routers. Users on a VLAN report that they can receive multicast streams from external sources, but the internal server 10.10.5.20 streaming to group 239.1.1.1 was just migrated to a new subnet. After the migration, receivers on a different VLAN stop receiving the stream, even though the new subnet is reachable and PIM is enabled on all interfaces. Which configuration element is most likely missing?

You are deploying 802.1X on an EX Series switch. The security team requires that if the RADIUS server is unreachable during authentication, endpoints that were previously authenticated on a port must not lose network access, but new endpoints must be denied. Which action should you configure under the authenticator's interface to meet this requirement?

You are configuring a rewrite rule on a Junos device to mark outgoing packets with the appropriate DSCP value based on their forwarding class. You want to ensure that packets in the expedited-forwarding class are marked with DSCP EF (46). Which configuration correctly accomplishes this?

Which THREE parameters are typically included in an LLDP-MED network policy TLV for voice application? (Choose three.)

When configuring Power over Ethernet (PoE) on an EX Series switch, which THREE parameters can be explicitly managed or configured per interface? (Choose three)

Which THREE actions can be executed by a firewall filter policer when traffic exceeds the specified rate? (Choose three)

When configuring advanced VLAN mapping on a Juniper MX Series router using flexible VLAN tagging, which term describes the action of replacing an incoming inner VLAN tag with a new tag before forwarding into the provider core?

You are configuring an EX Series switch to support IP phones that use LLDP-MED for network policy. Which two statements are true about LLDP-MED network policy TLVs? (Choose two.)

Which THREE actions occur during the EVPN Designated Forwarder (DF) election process on a multi-homed Ethernet segment? (Choose three)

You are the network architect for a large enterprise that uses BGP route reflectors (RRs) in a single cluster. You want to ensure that when an RR receives a route from a client, it reflects that route to other clients but does not reflect it back to the originating client. Which BGP attribute or mechanism prevents the route from being reflected back to the originating client?

You are configuring an EVPN-VXLAN fabric on Juniper devices. You want to enable the exchange of EVPN routes between PE routers. Which BGP configuration is required on each PE to support EVPN signaling?

An engineer needs to ensure that routes received from an external BGP peer are evaluated using multipath load balancing across different next hops. By default, Junos requires several conditions to be met for multipath. Which condition is mandatory for BGP multipath to consider two paths as valid candidates?

An operator configures BGP attribute value manipulation using a Junos routing policy. Specifically, the policy uses 'as-path-action prepend' combined with community matching. When is this outbound policy evaluated relative to BGP route selection?

You need to ensure that delay-sensitive voice traffic is serviced before all other queues on an egress interface. Which scheduler property should you configure for the voice forwarding class?

Which THREE parameters must be configured when implementing captive portal on an EX Series switch? (Choose three)

Which THREE statements describe the behavior of LLDP-MED capability on Junos EX Series switches? (Choose three.)

You are troubleshooting a Junos EX Series switch where a firewall filter applied to an ingress interface uses a policer to mark excess traffic as loss priority high. Downstream, a scheduler map on the egress interface is supposed to drop those high-loss-priority packets first using a drop profile. However, all excess packets are being dropped immediately at ingress instead of being forwarded and selectively discarded at egress. What is the most likely cause?

You need to adjust the OSPF cost on a specific interface to manipulate path selection. Which command sets the OSPF cost on an interface?

An engineer is configuring BGP route resolution and next-hop tracking in Junos. Which TWO circumstances will cause a BGP next hop to be marked as unresolved or unusable? (Choose two)

A network engineer must implement Anycast RP using MSDP between two data center routers running Junos OS. Which statement correctly describes a core requirement for MSDP peer establishment?

When configuring a BGP route reflector cluster in Junos, which THREE guidelines or operational behaviors should an engineer keep in mind? (Choose THREE)

Which Junos configuration hierarchy is used to define an EVPN routing instance of type 'evpn'?

When configuring OSPFv3, which Junos address-family hierarchy is used to enable OSPFv3 on an interface?

When troubleshooting EVPN control plane connectivity in Junos OS, which THREE commands provide essential diagnostic information regarding EVPN routing tables and peers? (Choose three)

You are deploying a Junos EX Series switch in a campus network. Voice traffic arrives untagged and must be placed into the expedited-forwarding forwarding class based solely on the Differentiated Services Code Point (DSCP) value carried in the IP header. No firewall filter is allowed on the ingress interface. Which classifier type should you apply to the interface?

You notice that an EX4300 switch power budget calculation is set to use 'class-based' allocation. What does this mean regarding how power is reserved for connected IP phones?

An enterprise network uses 802.1X authentication with dynamic VLAN assignment on EX Series switches. A client authenticates, and the RADIUS server returns both a VLAN name and a set of dynamic firewall filter names via RADIUS attributes (Filter-Id). When the client connects, the VLAN assignment works perfectly, but the firewall filters are not applied to the interface. What is the most likely cause?

You are deploying an EVPN-VXLAN fabric with a pair of Juniper EX Series switches acting as leaf devices for a dual-homed server. The server is connected to both leaf switches using a LAG with LACP, and you want to achieve All-Active multihoming so that both leaf switches can forward traffic to and from the server simultaneously. Which statement correctly describes the role of the Designated Forwarder (DF) in this scenario?

You are integrating an EVPN-VXLAN fabric with an existing MPLS L3VPN backbone using a data center gateway. Which route type allows seamless translation and communication of prefix routes between the EVPN instance and the IP-VRF MPLS VPN backbone?

An administrator wants to configure MSDP (Multicast Source Discovery Protocol) between two autonomous system border routers to share active source information. Which configuration hierarchy in Junos is used to define the MSDP peer relationship?

When configuring centralized gateway or distributed gateway routing models in an EVPN-VXLAN environment, how does a distributed gateway using Integrated Routing and Bridging (IRB) interfaces operate regarding default gateway functionality?

You have configured a custom scheduler map, but traffic in the best-effort queue is being starved during periods of heavy congestion. Which scheduler parameter should you adjust to guarantee a minimum bandwidth for this queue?

A Junos router is configured with BGP path selection, and multiple paths arrive with different MED values. Under what specific condition does Junos compare the MED values of paths from different autonomous systems during route selection?

When configuring EVPN multi-homing in all-active mode, which THREE key components or concepts must be properly established across the PE routers? (Choose three)

An enterprise runs a Junos BGP routing domain where a route reflector (RR) in cluster 10.0.0.1 reflects an eBGP-learned route to its iBGP clients. A client router receives the reflected route and notices the ORIGINATOR_ID attribute is set to 10.0.0.1, while the CLUSTER_LIST attribute contains 10.0.0.1. The client also has a second route reflector in the same cluster (10.0.0.2) as a peer. When the client advertises this route to the second route reflector, what does the second route reflector do with the update?

Which BGP address family must be enabled under the BGP neighbor configuration to exchange EVPN routes between PE routers?

An enterprise has deployed MSDP between two independent PIM sparse-mode domains. An administrator notices that Source-Active (SA) messages are looping between MSDP peers. Which Junos mechanism should be configured to prevent SA message loops in an MSDP topology?

An engineer is troubleshooting a large-scale enterprise network with multiple MSTP regions connected by a legacy RSTP region. How do boundary switches running MSTP interact with RSTP switches on shared segments?

You are configuring an EVPN-VXLAN fabric on Juniper devices. You need to ensure that the underlay network supports the VXLAN data plane and that BUM traffic is efficiently handled. Which two statements are correct about the VXLAN tunnel endpoint (VTEP) configuration on Junos? (Choose two.)

An IP phone connected to an EX4600 switch fails to power up. You run show poe interface ge-0/0/1 and find the status displays 'Hardware error'. What is the most appropriate troubleshooting step?

Which TWO of the following statements accurately describe EVPN Route Type 2 (MAC/IP Advertisement Route)? (Choose two)

A network engineer has configured BGP multipath on a Junos routing device using the 'multipath' statement under the routing-options bgp hierarchy. However, traffic is still only utilizing a single path. Which condition must be met for BGP multipath to become active for a destination prefix?

An engineer configures an EVPN instance with multiple bridge domains. Each bridge domain requires a unique VNI. Where are the VNI values mapped to their respective bridge domains in Junos OS?

Which TWO of the following statements correctly describe the operation and benefits of EVPN MAC mobility? (Choose two)

Which IPv4 address is assigned as the all-systems multicast group address, used by routers to query all hosts on a local subnet?

You are configuring OSPF on a Junos router and want to summarize routes from area 1 into area 0. The router is an ABR. Which configuration statement accomplishes this?

You are configuring OSPF database overflow protection to prevent a router from running out of memory due to an excessive number of external LSAs in the LSDB. Which configuration enables this feature globally?

You are configuring an OSPF NSSA and want to suppress the translation of Type-7 LSAs into Type-5 LSAs on one of the ABRs because another ABR is already performing the translation. Which statement is used?

An engineer configures protocol independent multicast (PIM) sparse-mode on a Junos device and notices that join messages are not reaching the Rendezvous Point (RP). Which CLI command should the engineer use to verify the operational state of the PIM neighbor adjacencies and confirm that the hello messages are successfully exchanged?

You are designing an enterprise network running Multiple Spanning Tree Protocol (MSTP) across multiple data center switches. To ensure that switches belong to the same MST region, which three parameters must match identically across all switches in that region?

A network administrator wants to advertise an aggregate BGP route while suppressing the more specific component routes from being sent to external peers. Which Junos routing-options configuration achieves this?

You are deploying a Junos device where a single physical interface carries both a latency-sensitive multicast video stream and best-effort file transfers. You must ensure that the video traffic is transmitted with the lowest possible per-hop latency and jitter, even when the best-effort queue is congested, without starving the other queues. Which CoS feature should you configure on the egress interface to meet this requirement?

Which protocol version introduces explicit source inclusion and exclusion lists (TO_EX, TO_IN, IS_IN, IS_EX) in membership reports?

You are configuring an EX Series switch to support 802.1X authentication with multiple supplicants on a single interface. A hub connects three devices to interface ge-0/0/5. You want each device to be authenticated individually and placed into its assigned VLAN. Which configuration is required to support this?

An engineer is troubleshooting multicast forwarding and RPF failures on a Junos routing instance. Which THREE conditions will cause a multicast RPF check failure? (Choose three)

You are troubleshooting a Junos router that is not selecting the expected BGP path for a prefix. The router receives the prefix from two eBGP peers. Peer A sends the route with a MED of 50 and an AS path length of 3. Peer B sends the same prefix with a MED of 100 and an AS path length of 2. Both peers are in the same neighboring AS. The router is configured with 'multipath multiple-as' and 'bgp multipath' under the global BGP hierarchy. Which path will be selected as best, and why?

An administrator notices that broadcast, unknown unicast, and multicast (BUM) traffic sent from a local host is looping back to the originating multi-homed PE when using an all-active Ethernet segment. Which mechanism prevents this loop in EVPN?

You are configuring a captive portal on an EX Series switch. You want to ensure that specific management traffic and critical server subnets are accessible to clients *before* they authenticate through the captive portal. Which configuration feature accomplishes this?

Which THREE parameters are part of the standard Junos BGP route selection algorithm prior to evaluating the router ID? (Choose three)

You administer an EX4300 switch that connects to a third-party IP phone which relies on LLDP-MED to learn its voice VLAN and DSCP marking. The phone boots and registers, but call audio is marked best-effort and the phone places itself in the native data VLAN. You confirm the phone's LLDP-MED stack is enabled. On the switch interface you issued 'set protocols lldp-med interface ge-0/0/12.0' and committed, yet the phone still receives no network policy. Which configuration element must you add to deliver the voice parameters?

You are configuring a voice VLAN on an EX2300 switch. The IP phones support LLDP-MED and must automatically obtain the voice VLAN ID. You want to ensure that the switch advertises the voice VLAN to the phones. Which configuration step is required on the access interface?

You want to apply a rewrite rule on an outgoing interface to remark the DSCP bits of packets leaving your Juniper router. Where must this rewrite rule be applied within the CoS hierarchy?

You are troubleshooting an issue where an 802.1X supplicant on a Windows client fails to connect to an EX Series switch port. The switch logs show 'EAPOL-TIMEOUT' errors. What does this error indicate?

An EX4300 switch is configured with PoE management mode 'class' on all access ports. A new IP phone that advertises LLDP-MED power requirements is connected, but the phone powers on and then immediately reboots in a loop. The switch logs show the interface powering the port, then dropping power shortly after. Which action is most likely to resolve the phone boot loop?

A network designer needs to implement BGP route reflection where multiple route reflectors are deployed in the same cluster to provide redundancy. What parameter must be identical across all route reflectors in that same cluster to prevent routing loops?

Which TWO options are valid authentication methods that can be specified in the 'authentication-order' statement on an EX Series switch interface? (Choose two)

You need to design a scalable Layer 2 architecture across multiple data center buildings using Juniper switches, avoiding single points of failure while preventing bridging loops. Which scaling mechanism allows Active-Active multihoming without running Spanning Tree Protocol across the core?

An administrator configures BGP dampening on a Junos router to mitigate the impact of flapping routes. When a route exceeds the reuse threshold after being suppressed, what happens to its penalty value?

You are troubleshooting a Juniper EX Series switch running RSTP. The network experiences intermittent loops. You suspect that BPDU guard is not functioning as expected on an edge port. Which statement is correct about BPDU guard behavior on EX Series switches?

A network engineer is troubleshooting a PIM Sparse-Mode domain where multicast traffic from a source is not reaching receivers. The engineer suspects that the Rendezvous Point (RP) is not receiving PIM Register messages from the First-Hop Router (FHR). Which TWO statements describe reasons why the FHR might fail to send Register messages to the RP? (Choose two.)