Juniper Networks Enterprise Routing and Switching, Specialist (JNCIS-ENT, JN0-352) (JNCIS-ENT) (JNCIS-ENT) — Questions 376–450

A network engineer wants to verify IS-IS link-state database entries, specifically checking for TLVs that carry extended IP reachability information with wide metrics. Which Junos operational command should be used?

Which statement is true regarding the behavior of storm control when the traffic rate exceeds the configured threshold?

An administrator implements OSPF on a Junos router with virtual links to span a disconnected non-backbone area across a non-backbone transit area to reach Area 0. What is a key design best practice regarding OSPF virtual links in enterprise networks?

What is the default IS-IS metric for an interface in Junos?

You are troubleshooting a connectivity issue between an EX4300 switch access port and an end-host. The port is configured as an access port for VLAN 100, but the host cannot communicate. You run 'show ethernet-switching interface ge-0/0/1' and notice the port status is down/down. Which underlying reason most likely explains this state?

Which TWO actions occur when a Junos BGP routing policy includes the 'next policy' action? (Choose two)

An administrator configures BGP multipath on a Junos router. Which THREE conditions must be met for BGP paths to be considered equal and installed as multipaths? (Choose three)

An engineer is troubleshooting IS-IS adjacency formation failures on a Junos device. Which THREE parameters must match or be compatible between neighboring routers to successfully establish an IS-IS adjacency? (Choose three)

Which TWO criteria are used by Junos OS to select the OSPF router ID if no explicit router ID is configured under [edit routing-options]? (Choose two)

You configure port security on a switch interface and set the violation action to 'restrict'. What happens when a port security violation occurs under this setting?

A network engineer configures an eBGP session on a Junos device and notices that routes learned from the external peer are not being installed in the routing table or advertised to other peers. What is the default behavior regarding eBGP route propagation and next-hop resolution on Junos OS?

An administrator is setting up VRRP tracking on an EX4300 switch interface. If the uplink interface monitoring the core network fails, what should happen to the VRRP priority on the gateway interface?

Which TWO options represent valid benefits of configuring Link Aggregation Groups (LAG)? (Choose two)

Which interface naming convention is used for an IP-IP tunnel interface in Junos?

Which command verifies the interface bindings associated with a specific routing instance named 'engineering'?

An EX Series switch running RSTP receives BPDUs with superior path cost information from an unauthorized access switch. Which feature should you enable on access-facing ports to prevent these unauthorized BPDUs from altering the spanning tree topology?

You need to verify the regional configuration name and revision number currently active on an EX Series switch running MSTP. Which operational command should you use?

Which Junos command displays the status of all configured tunnel interfaces on the device?

An engineer is deploying Selective QinQ where customer inner VLAN tags must be preserved while the outer tag is swapped or added based on ingress port rules. Which Junos statement enables tag preservation?

An administrator is configuring route leaking between a virtual-router routing instance and the default inet.0 table. Which THREE methods or configuration constructs can be used to achieve route leaking in Junos? (Choose three)

An administrator needs to delete a MAC address entry from the ethernet-switching table on an EX Series switch due to a stuck entry. Which operational command is used?

Which THREE statements are true regarding IP-IP encapsulation in Junos OS? (Choose three.)

When using authentication in IS-IS, where can you apply the password?

What is the primary function of a Junos tunnel interface when used in conjunction with routing protocols?

Which Junos configuration command enables Dynamic ARP Inspection (DAI) for a specific VLAN named 'VLAN10'?

Which OSPF packet type is responsible for discovering neighbors and maintaining adjacencies on a Junos device?

Which of the following are true about pseudonode LSPs? (Choose THREE)

Which operational command displays the status of MACsec connections and associated security association parameters on an EX Series switch?

An operator troubleshooting BGP path selection notices two routes have identical Local Preference, AS path length, origin, MED, and both are eBGP routes. Which attribute does the BGP path selection algorithm evaluate next?

An administrator has deployed a new EX Series switch running RSTP and notices that access ports connected to end-user workstations take up to 30 seconds to transition to the forwarding state. Which configuration command should be applied to immediately resolve this delay for access ports?

You need to redistribute OSPF routes into IS-IS. Where do you configure this?

Which Junos configuration hierarchy is used to configure secure access port features such as DHCP snooping and Dynamic ARP Inspection?

Which TWO statements are correct regarding the operation of MSTP instance 0 (CIST)? (Choose two.)

Which CLI command verifies that OSPF Graceful Restart helper mode is enabled by default on a Juniper routing platform?

While reviewing BGP updates, you notice an attribute type code of 3 with a value representing an IP address. Which well-known mandatory path attribute is this?

You are configuring Multi-Chassis Link Aggregation (MC-LAG) across two Juniper switches acting as separate control plane devices. Which protocol is used between the peer switches to synchronize state and ensure MAC address table consistency across the MC-LAG domain?

Which TWO statements accurately describe the behavior of the BGP AS_PATH attribute? (Choose two)

Which THREE parameters are part of a standard Junos GRE tunnel interface configuration block? (Choose three)

Which TWO Junos configuration hierarchies are involved when setting up a functional GRE tunnel with an IP address? (Choose two)

You are troubleshooting a load-balancing configuration across multiple equal-cost paths (ECMP) on a Juniper MX Series router. Traffic is hashing persistently onto only one link. Which action should you take to enable per-packet or per-flow load balancing across the ECMP paths?

An engineer is configuring a trunk port on an EX Series switch and needs to ensure that untagged and priority-tagged frames are handled correctly. Which TWO configuration actions are required? (Choose two.)

During an audit of a Juniper EX4300 Virtual Chassis, you notice that member 1 and member 2 are connected via mixed 1G and 10G uplink ports. How does Junos handle mixed-speed Virtual Chassis port configurations?

When troubleshooting a non-functional IP-IP or GRE tunnel on a Junos routing device, which TWO diagnostic steps or commands are commonly utilized? (Choose two.)

What is the function of the DIS in an IS-IS broadcast network?

An administrator configures IP Source Guard on an access switch port. When a client connects, its traffic is dropped even though it acquired an IP via DHCP. Reviewing logs shows no DHCP snooping binding. What is the root cause?

Which command allows an administrator to view real-time BGP routing updates being sent and received on a Junos device?

During OSPF database synchronization, two Junos routers exchange Database Description (DBD) packets. One router repeatedly sends DBD packets with the master/slave bit set incorrectly or encounters sequence number mismatches, causing the adjacency to loop in the Exchange state. Which OSPF packet type is immediately sent by a router to request missing link-state information once the ExStart/Exchange transition completes?

An engineer needs to configure a Junos device to operate in an IS-IS routing domain where the router should connect both Level 1 and Level 2 areas, forming a boundary between them. Which configuration command under the [edit protocols isis interface] hierarchy correctly enables dual-level operations on the interface?

You need to establish a point-to-point GRE tunnel between two Juniper MX Series routers. Which tunnel services type must be defined under the chassis configuration when using aggregated interface inline services?

You need to configure authentication for a BGP peering session on a Junos device to prevent spoofing attacks. Where is the MD5 authentication key configured?

An administrator needs to verify the exact BGP timers negotiated with an eBGP peer on a Junos device. Which operational command should be used?

You need to configure a static route that acts as a discard route, ensuring that any traffic destined for a specific unassigned subnet is silently dropped. Which configuration syntax should you use?

An engineer configures a BGP policy to set the MED attribute on routes advertised to an eBGP peer. What is the primary purpose of the MED (Multi-Exit Discriminator) attribute?

An engineer is configuring static routes in Junos OS and wants to ensure high availability. Which TWO features can be implemented with static routes to achieve path redundancy? (Choose two)

Which operational command displays the configured member IDs, priorities, and roles in an EX Series Virtual Chassis?

What information is contained within an OSPF Type 1 (Router LSA)?

Which command allows you to inspect the active forwarding table entries and verify next-hops on a Junos router?

Which TWO traffic conditions will trigger storm control drops on a configured switch interface? (Choose two)

You are troubleshooting a route leak between two eBGP peers. You notice that an incoming route contains your own ASN in the AS_PATH attribute, yet the route was installed. Which Junos feature allowed this behavior, and where is it configured?

In an RSTP-enabled network, which port role immediately transitions to the forwarding state upon failure of the designated port on the segment, bypassing the traditional listening and learning states?

While troubleshooting an RSTP topology on EX Series switches, you notice that a designated port has stopped receiving BPDUs from its upstream neighbor due to a unidirectional link failure. Which feature should you enable to prevent this port from transitioning to a Designated Forwarding state and causing a loop?

You are configuring OSPF on a Junos device and notice that Type 3 LSAs are not being generated or propagated into a specific area. When examining the configuration under protocols ospf, you see that the area is defined with the no-summaries parameter. Which area type has been configured?

Which TWO commands can an administrator use on a Junos device to verify OSPF interface configurations and operational status? (Choose two)

An administrator needs to create a VLAN named 'voice' with a VLAN ID of 50 on a Junos EX Series switch. Which configuration path achieves this?

Which TWO statements are true regarding loop protection in RSTP? (Choose two.)

Which TWO parameters can be configured when setting up storm control on an EX Series switch interface? (Choose two)

An administrator configures MACsec on a point-to-point link between two EX switches. Encrypted frames are received by the remote switch, but decryption fails, and packets are dropped. What is the most likely reason for this decryption failure?

You are configuring OSPF redistribution on a Junos router and want to ensure that external routes imported from a static routing table retain an escalating external metric. Which external route metric type (E1 or E2) should you choose if you want the internal cost to be added to the external cost during path selection?

You are troubleshooting an RSTP topology where a port remains in the discarding state. You suspect a proposal-agreement handshake is failing. Which mechanism is responsible for accelerating this handshake in RSTP?

What is the role of the Root Port in an RSTP topology?

When configuring a routing instance of type 'virtual-router', what is required to allow communication between the virtual router instance and the default routing instance?

An engineer needs to configure a Layer 2 protocol tunneling (L2PT) feature on an EX Series switch trunk port to tunnel BPDU frames from a customer switch across a service provider network. Where is L2PT enabled in Junos?

You are troubleshooting an OSPF adjacency issue between two Juniper EX Series switches. One switch logs an error stating 'OSPF packet received with mismatched area ID'. Where in the Junos CLI should you check and correct this parameter?

Which THREE attributes are optional transitive BGP path attributes? (Choose three)

An administrator wants to remove an interface from an access VLAN and clear its configuration. Which TWO configuration commands are required to clean up the interface? (Choose two.)