350-501 Networking — All Questions With Answers

An SP engineer is configuring IS-IS on a router and specifies a NET address of 49.0001.1921.6800.1001.00. What does the '00' at the end represent?

Question 2mediummultiple choice

In an OSPF network, an engineer wants to minimize the size of the routing table in a non-backbone area while still allowing the area to learn external routes from other ASs. Which OSPF area type should be configured?

Question 3easymultiple choice

Which BGP attribute is NOT considered in the BGP best path selection process when all other attributes are equal and the routes are from different ASs?

Question 4hardmultiple choice

An SP network uses MPLS to provide IPv6 connectivity over an IPv4 backbone using 6PE. Which BGP extension is required on the provider edge routers to exchange IPv6 prefixes with an IPv4 next-hop?

Question 5easymultiple choice

In IS-IS, which type of LSP is used to advertise prefix information for IPv4 and IPv6 in a modern SP network that supports traffic engineering?

Question 6mediummultiple choice

An OSPF network is configured with RSVP-TE. Which OSPF extension is used to advertise TE link attributes such as bandwidth and administrative group?

Question 7mediummultiple choice

In BGP route reflection, what is the purpose of the ORIGINATOR_ID attribute?

Question 8hardmultiple choice

An SP is implementing IPv6 transition using MAP-T. Which encapsulation method does MAP-T use?

Question 9mediummultiple choice

In IS-IS, which metric type supports traffic engineering (TE) and is required for segment routing?

Question 10easymultiple choice

Which BGP attribute influences inbound traffic to an AS by affecting the path selection of eBGP peers?

Question 11mediummultiple choice

An SP is deploying IS-IS fast convergence. Which mechanism triggers an immediate SPF computation when a neighbor fails?

Question 12hardmultiple choice

In a BGP confederation, which AS number is used in the AS_PATH to prevent loops within the confederation?

Question 13mediummulti select

An SP engineer is designing an OSPF network and wants to reduce the number of LSAs in a stub area. Which TWO area types would block Type 5 LSAs but allow Type 3 LSAs? (Choose two.)

Question 14easymulti select

Which THREE BGP attributes are considered in the best path selection process before comparing IGP metric to the next-hop? (Choose three.)

Question 15hardmulti select

An SP is deploying IPv6 using 6VPE. Which THREE components are required? (Choose three.)

Question 16mediummultiple choice

An engineer is configuring IS-IS in a service provider network. The network uses wide metrics for traffic engineering. Which TLV is mandatory for IS-IS to carry traffic engineering (TE) information in accordance with RFC 5305?

Question 17easymultiple choice

In an IS-IS network, a router has a NET of 49.0001.1921.6800.1001.00. What does the '00' at the end represent?

Question 18mediummultiple choice

A service provider is deploying OSPFv3 for IPv6 in its core. The network uses multiple areas. Which LSA type is used by OSPFv3 to advertise prefix information for inter-area routes?

Question 19hardmultiple choice

An ISP is implementing BGP PIC (Prefix Independent Convergence) for edge routers. Which BGP feature must be enabled to support PIC for core-facing failures?

Question 20mediummultiple choice

Which BGP attribute is used to prefer a specific entry point into an AS when multiple ASBRs are advertising the same prefix to a neighboring AS?

Question 21easymultiple choice

Which OSPF network type elects a Designated Router (DR) and Backup Designated Router (BDR) to reduce the number of adjacencies on a multi-access segment?

Question 22mediummultiple choice

An SP is designing an OSPF network with a totally stubby area to reduce the LSA database. Which LSA types are blocked by default in a totally stubby area?

Question 23mediummultiple choice

In IS-IS, what is the result of configuring wide metrics on all interfaces?

Question 24hardmultiple choice

A service provider is implementing 6VPE to provide IPv6 L3VPN services over an MPLS core. Which BGP address family must be configured on the PE routers to exchange IPv6 VPN routes?

Question 25mediummultiple choice

In BGP, which attribute is used to prevent routing loops when route reflectors are deployed?

Question 26easymultiple choice

Which BGP attribute is locally significant and used to influence outbound traffic from an AS?

Question 27hardmultiple choice

An SP is deploying IS-IS fast convergence using Partial Route Computation (PRC). Under which condition does PRC occur?

Question 28mediummulti select

A service provider is designing an OSPF network for both IPv4 and IPv6. Which two features are supported by OSPFv3 but not by OSPFv2? (Choose two.)

Question 29mediummulti select

Which three BGP attributes are considered in the route selection process before comparing MED? (Choose three.)

Question 30hardmulti select

An ISP is implementing 6PE for IPv6 transport over MPLS. Which two conditions are required for 6PE to work? (Choose two.)

Question 31easymultiple choice

In IS-IS, which type of router is responsible for routing between different areas and also maintains a Level 1 Link State Database?

Question 32mediummultiple choice

An SP network engineer configures IS-IS with wide metrics. Which statement is true about IS-IS wide metrics compared to narrow metrics?

Question 33hardmultiple choice

A service provider uses OSPFv3 for IPv6 routing in the core. Which statement correctly describes OSPFv3 adjacency formation on a broadcast multiaccess network?

Question 34mediummultiple choice

In BGP route selection, which attribute is considered before the MED when comparing routes from different ASes?

Question 35hardmultiple choice

A service provider wants to provide IPv6 connectivity over an MPLS IPv4 core using 6PE. Which BGP extension is required on the provider edge routers?

Question 36easymultiple choice

In IS-IS, what is the purpose of the Partial Route Computation (PRC)?

Question 37mediummultiple choice

Which OSPF area type does not allow external routes (Type 5 LSAs) but does allow inter-area routes and can have a default route injected?

Question 38hardmultiple choice

A service provider deploys BGP route reflectors in the core. Which mechanism prevents routing loops within the route reflector cluster?

Question 39easymultiple choice

Which IS-IS TLV is used to carry IPv6 reachability information?

Question 40mediummultiple choice

In OSPF Traffic Engineering (TE) extensions for RSVP-TE, which LSA type is used to carry TE information?

Question 41hardmultiple choice

A service provider wants to use BGP Prefix Independent Convergence (PIC) for faster failover. Which BGP feature must be enabled to support PIC?

Question 42mediummultiple choice

In BGP confederation, which attribute is used to prevent loops between sub-ASes?

Question 43mediummulti select

A service provider is designing an OSPF network with multiple areas. Which two area types prevent Type 5 LSAs from entering the area (choose two)?

Question 44mediummulti select

Which three BGP attributes are considered before the MED in the BGP best path selection process?

Question 45hardmulti select

An SP engineer configures IS-IS fast convergence mechanisms. Which three techniques help achieve sub-second convergence in IS-IS?

Question 46easymultiple choice

Which IS-IS level is used for routing within an area?

Question 47easymultiple choice

In OSPF, which type of area does not allow external routes and only accepts a default route?

Question 48mediummultiple choice

Which BGP attribute is used to influence inbound traffic to a specific AS by indicating the preferred path?

Question 49mediummultiple choice

In BGP route selection, which attribute is considered before LOCAL_PREF?

Question 50hardmultiple choice

In IS-IS, which TLV is used to carry traffic engineering information for MPLS-TE?

Question 51mediummultiple choice

Which OSPF adjacency type requires DR/BDR election on a multi-access network?

Question 52hardmultiple choice

A service provider wants to provide IPv6 connectivity over an existing MPLS IPv4 core using BGP extensions. Which technology should be used?

Question 53easymultiple choice

Which IS-IS metric type supports values up to 2^24-1 and is used for traffic engineering?

Question 54mediummultiple choice

Which BGP mechanism can reduce the number of iBGP sessions in a large SP network while preventing routing loops?

Question 55mediummultiple choice

In OSPFv3, which of the following is true about the protocol's operation?

Question 56hardmultiple choice

A service provider is implementing Segment Routing in an IS-IS network. Which TLV is used to advertise the Segment Routing Global Block (SRGB)?

Question 57easymultiple choice

Which OSPF area type can import external routes as Type 7 LSAs?

Question 58mediummulti select

A service provider is designing an OSPF network with multiple areas. Which two area types prevent Type 5 LSAs from being flooded? (Choose two.)

Question 59mediummulti select

Which three BGP attributes are considered during the route selection process before comparing AS_PATH length? (Choose three.)

Question 60hardmulti select

A service provider is deploying IPv6 transition mechanisms. Which three technologies use encapsulation over an IPv4 network? (Choose three.)

Question 61easymultiple choice

In IS-IS, which type of router is responsible for exchanging routing information between different areas?

Question 62mediummultiple choice

An SP network is migrating from IS-IS narrow metrics to wide metrics. What is a key advantage of using wide metrics?

Question 63hardmultiple choice

In OSPFv3 (for IPv6), which of the following statements is true regarding OSPFv3 packet format and authentication?

Question 64mediummultiple choice

In BGP route selection, if two routes have the same weight, local preference, and are both locally originated, which attribute is considered next?

Question 65mediummultiple choice

A service provider is implementing BGP PIC (Prefix Independent Convergence) for its core network. Which mechanism does BGP PIC primarily rely on to achieve fast convergence?

Question 66easymultiple choice

In IS-IS, what is the purpose of the NET (Network Entity Title) address field SEL (Selector) byte?

Question 67hardmultiple choice

Which OSPF area type is most suitable for a service provider's customer-facing network where external routes are blocked, but internal routes (including inter-area) are allowed, and the area should not accept Type 5 LSAs?

Question 68mediummultiple choice

In BGP, what is the purpose of the ORIGINATOR_ID attribute in a route reflector environment?

Question 69easymultiple choice

Which technology allows an IPv6-only customer edge router to connect to an MPLS provider edge router using IPv4 transport, encapsulating IPv6 packets in MPLS with a labeled IPv4 next-hop?

Question 70mediummultiple choice

An engineer is configuring IS-IS fast convergence. Which mechanism provides sub-second failure detection independently of the routing protocol?

Question 71hardmultiple choice

In OSPF TE extensions for RSVP-TE, which LSA type is used to carry TE information (such as link attributes) in OSPF?

Question 72easymultiple choice

Which BGP attribute is used to influence inbound traffic to a multi-homed AS by indicating the preferred entry point?

Question 73mediummulti select

A service provider is designing an OSPF network with multiple areas. Which TWO area types allow external routes (Type 5 LSAs) to be injected into the area? (Choose two.)

Question 74hardmulti select

Which THREE of the following are valid BGP extended community attributes? (Choose three.)

Question 75mediummulti select

An engineer is configuring BGP route reflectors to scale iBGP. Which TWO attributes are used to prevent routing loops in a route reflector cluster? (Choose two.)

Question 76easymultiple choice

Which IS-IS router type maintains a full Layer 2 routing table of all areas and can act as a gateway between areas?

Question 77mediummultiple choice

An SP engineer is designing an OSPF network with several remote sites that should not receive external routes but need to reach external destinations via a default route. Which OSPF area type best meets this requirement while also preventing Type 5 LSAs from entering?

Question 78hardmultiple choice

In BGP, an SP router receives multiple routes to the same prefix. The first route has a weight of 100, LOCAL_PREF of 200, AS_PATH length 3, and is learned via eBGP. The second route has weight 50, LOCAL_PREF 150, AS_PATH length 2, and is learned via iBGP. According to BGP route selection, which route will be preferred?

Question 79easymultiple choice

Which IS-IS TLV is used to carry Traffic Engineering (TE) information such as link bandwidth and TE metric in modern SP networks?

Question 80mediummultiple choice

A service provider is implementing 6PE to carry IPv6 traffic over an existing MPLS IPv4 core. Which BGP extension is required on the provider edge (PE) routers to exchange IPv6 prefixes with an IPv4 next-hop?

Question 81mediummultiple choice

An SP network uses OSPF with RSVP-TE for traffic engineering. Which OSPF extension is required to advertise TE link parameters such as maximum reservable bandwidth?

Question 82hardmultiple choice

In an IS-IS network, a service provider wants to achieve fast convergence using Partial Route Computation (PRC). Which of the following events triggers a PRC instead of a full SPF?

Question 83easymultiple choice

Which BGP attribute is used to indicate the preference of a route within an AS and is propagated to iBGP peers but not to eBGP peers by default?

Question 84mediummultiple choice

An SP network is implementing BGP PIC (Prefix Independent Convergence) for fast failover. What is the primary mechanism used by BGP PIC to achieve sub-second convergence?

Question 85easymultiple choice

In IS-IS, which type of metric uses 24 bits (wide) to allow higher link bandwidth values and is required for TE support?

Question 86hardmultiple choice

An SP is deploying NAT64 to allow IPv6-only clients to access IPv4 servers. Which address translation mechanism is used by NAT64 to map IPv6 addresses to IPv4 addresses?

Question 87mediummultiple choice

In BGP confederation, how does the AS_PATH attribute handle the confederation sub-AS numbers to prevent loops?

Question 88mediummulti select

A service provider is configuring BGP route reflectors to scale iBGP. Which two mechanisms are used to prevent routing loops in a route reflector environment? (Choose two.)

Question 89hardmulti select

An SP network uses OSPFv3 for IPv6 routing. Which three statements about OSPFv3 are true? (Choose three.)

Question 90mediummulti select

A service provider is implementing MAP-T (Mapping of Address and Port using Translation) to transition customers from IPv4 to IPv6. Which two characteristics of MAP-T are true? (Choose two.)

Question 91mediummultiple choice

A service provider is migrating from OSPF to IS-IS in the core network. They need to support Traffic Engineering and Segment Routing. Which IS-IS TLV must be supported to carry TE information?

Question 92easymultiple choice

In an OSPF network, an engineer wants to reduce the size of the routing table and prevent external routes from being advertised into an area. Which area type should be configured?

Question 93mediummultiple choice

A service provider uses BGP route reflectors to scale iBGP. A route reflected from a route reflector arrives at a client with the originator-id set. What is the purpose of the originator-id attribute?

Question 94hardmultiple choice

An ISP is implementing 6PE to provide IPv6 connectivity over an MPLS network that only supports IPv4 in the core. In 6PE, how are IPv6 prefixes carried across the MPLS backbone?

Question 95easymultiple choice

In IS-IS, what is the purpose of the System ID portion of the NET address?

Question 96mediummultiple choice

Which BGP attribute is used to influence inbound traffic to an AS by advertising a preferred path to a neighbor AS?

Question 97hardmultiple choice

A service provider is deploying BGP PIC (Prefix Independent Convergence) for edge routers. What is the primary benefit of BGP PIC?

Question 98mediummultiple choice

In OSPFv3, what change was introduced compared to OSPFv2 for supporting IPv6?

Question 99easymultiple choice

Which IS-IS metric type is required for traffic engineering and segment routing?

Question 100mediummultiple choice

A service provider wants to enable fast convergence for OSPF networks. Which feature should be enabled to detect link failures in sub-second time?

Question 101mediummultiple choice

In BGP route selection, when comparing two routes with the same LOCAL_PREF, which attribute is considered next?

Question 102hardmultiple choice

An ISP is implementing MAP-T to transition to IPv6. Which of the following best describes MAP-T?

Question 103mediummulti select

A service provider is designing an OSPF network for MPLS-TE. Which two OSPF LSA types are used to advertise Traffic Engineering information? (Choose two.)

Question 104mediummulti select

Which three BGP communities are standardized and commonly used for inter-AS traffic engineering? (Choose three.)

Question 105hardmulti select

An ISP is deploying BGP confederations to reduce iBGP mesh requirements. Which of the following statements about BGP confederations are true? (Choose two.)

Question 106easymultiple choice

What is the purpose of the SEL (NSAP Selector) field in an IS-IS NET address?

Question 107mediummultiple choice

An SP engineer is troubleshooting IS-IS routing. The network uses wide metrics, and some links have been configured with TE metrics. Which statement correctly describes the relationship between TE metrics and narrow metrics in IS-IS?

Question 108hardmultiple choice

In an OSPF network, an area is configured as a Not-So-Stubby Area (NSSA). Which statement about LSA types in this area is correct?

Question 109mediummultiple choice

An SP uses OSPF with Traffic Engineering extensions to support RSVP-TE. Which LSA type is used to carry TE information in OSPF?

Question 110easymultiple choice

In IS-IS, a router is configured as L1 only. Which statement is true regarding its routing table?

Question 111mediummultiple choice

Which BGP attribute is used to influence inbound traffic to an AS by indicating the preferred path into the AS?

Question 112hardmultiple choice

A service provider is deploying BGP PIC (Prefix Independent Convergence) to improve convergence after a link failure. Which mechanism does BGP PIC leverage to achieve fast failover?

Question 113mediummultiple choice

In OSPFv3, which statement correctly describes how OSPFv3 differs from OSPFv2 regarding router IDs and adjacencies?

Question 114easymultiple choice

Which BGP community is used to prevent a route from being advertised to any eBGP peers?

Question 115hardmultiple choice

An SP is deploying 6VPE (IPv6 L3VPN). Which BGP extensions are used to carry IPv6 VPN prefixes?

Question 116mediummulti select

Which TWO of the following are characteristics of IS-IS Partial Route Computation (PRC)? (Choose two.)

Question 117mediummulti select

Which TWO BGP attributes are considered during the best path selection process and can be used to influence outbound traffic from an AS? (Choose two.)

Question 118hardmulti select

Which THREE of the following are valid IS-IS TLV types used to support traffic engineering and segment routing? (Choose three.)

Question 119easymulti select

Which TWO of the following are types of OSPF stub areas? (Choose two.)

Question 120mediummulti select

A service provider is implementing BGP route reflectors to scale iBGP. Which THREE mechanisms are used to prevent routing loops in a route reflector topology? (Choose three.)

Question 121easymulti select

A service provider is deploying IS-IS with wide metrics to support traffic engineering. Which two statements about IS-IS wide metrics are correct?

Question 122mediummulti select

An SP network is running OSPFv3 for IPv6 and needs to support traffic engineering extensions for RSVP-TE. Which three statements about OSPFv3 TE extensions are true?

Question 123mediummulti select

An engineer is designing an iBGP route reflector topology to improve scalability. Which two statements about BGP route reflectors are correct?

Question 124hardmulti select

A service provider is implementing 6VPE to provide IPv6 L3VPN services. Which three statements about 6VPE are true?

Question 125easymulti select

An SP network is using IS-IS and wants to achieve fast convergence using BFD. Which two statements about BFD in IS-IS are correct?

Question 1mediummultiple choice

An SP engineer is configuring IS-IS on a router and specifies a NET address of 49.0001.1921.6800.1001.00. What does the '00' at the end represent?

Question 2mediummultiple choice

In an OSPF network, an engineer wants to minimize the size of the routing table in a non-backbone area while still allowing the area to learn external routes from other ASs. Which OSPF area type should be configured?

Question 3easymultiple choice

Which BGP attribute is NOT considered in the BGP best path selection process when all other attributes are equal and the routes are from different ASs?

Question 4hardmultiple choice

An SP network uses MPLS to provide IPv6 connectivity over an IPv4 backbone using 6PE. Which BGP extension is required on the provider edge routers to exchange IPv6 prefixes with an IPv4 next-hop?

Question 5easymultiple choice

In IS-IS, which type of LSP is used to advertise prefix information for IPv4 and IPv6 in a modern SP network that supports traffic engineering?

Question 6mediummultiple choice

An OSPF network is configured with RSVP-TE. Which OSPF extension is used to advertise TE link attributes such as bandwidth and administrative group?

Question 7mediummultiple choice

In BGP route reflection, what is the purpose of the ORIGINATOR_ID attribute?

Question 8hardmultiple choice

An SP is implementing IPv6 transition using MAP-T. Which encapsulation method does MAP-T use?

Question 9mediummultiple choice

In IS-IS, which metric type supports traffic engineering (TE) and is required for segment routing?

Question 10easymultiple choice

Which BGP attribute influences inbound traffic to an AS by affecting the path selection of eBGP peers?

Question 11mediummultiple choice

An SP is deploying IS-IS fast convergence. Which mechanism triggers an immediate SPF computation when a neighbor fails?

Question 12hardmultiple choice

In a BGP confederation, which AS number is used in the AS_PATH to prevent loops within the confederation?

Question 13mediummulti select

An SP engineer is designing an OSPF network and wants to reduce the number of LSAs in a stub area. Which TWO area types would block Type 5 LSAs but allow Type 3 LSAs? (Choose two.)

Question 14easymulti select

Which THREE BGP attributes are considered in the best path selection process before comparing IGP metric to the next-hop? (Choose three.)

Question 15hardmulti select

An SP is deploying IPv6 using 6VPE. Which THREE components are required? (Choose three.)

Question 16mediummultiple choice

An engineer is configuring IS-IS in a service provider network. The network uses wide metrics for traffic engineering. Which TLV is mandatory for IS-IS to carry traffic engineering (TE) information in accordance with RFC 5305?

Question 17easymultiple choice

In an IS-IS network, a router has a NET of 49.0001.1921.6800.1001.00. What does the '00' at the end represent?

Question 18mediummultiple choice

A service provider is deploying OSPFv3 for IPv6 in its core. The network uses multiple areas. Which LSA type is used by OSPFv3 to advertise prefix information for inter-area routes?

Question 19hardmultiple choice

An ISP is implementing BGP PIC (Prefix Independent Convergence) for edge routers. Which BGP feature must be enabled to support PIC for core-facing failures?

Question 20mediummultiple choice

Which BGP attribute is used to prefer a specific entry point into an AS when multiple ASBRs are advertising the same prefix to a neighboring AS?

Question 21easymultiple choice

Which OSPF network type elects a Designated Router (DR) and Backup Designated Router (BDR) to reduce the number of adjacencies on a multi-access segment?

Question 22mediummultiple choice

An SP is designing an OSPF network with a totally stubby area to reduce the LSA database. Which LSA types are blocked by default in a totally stubby area?

Question 23mediummultiple choice

In IS-IS, what is the result of configuring wide metrics on all interfaces?

Question 24hardmultiple choice

A service provider is implementing 6VPE to provide IPv6 L3VPN services over an MPLS core. Which BGP address family must be configured on the PE routers to exchange IPv6 VPN routes?

Question 25mediummultiple choice

In BGP, which attribute is used to prevent routing loops when route reflectors are deployed?

Question 26easymultiple choice

Which BGP attribute is locally significant and used to influence outbound traffic from an AS?

Question 27hardmultiple choice

An SP is deploying IS-IS fast convergence using Partial Route Computation (PRC). Under which condition does PRC occur?

Question 28mediummulti select

A service provider is designing an OSPF network for both IPv4 and IPv6. Which two features are supported by OSPFv3 but not by OSPFv2? (Choose two.)

Question 29mediummulti select

Which three BGP attributes are considered in the route selection process before comparing MED? (Choose three.)

Question 30hardmulti select

An ISP is implementing 6PE for IPv6 transport over MPLS. Which two conditions are required for 6PE to work? (Choose two.)

Question 31easymultiple choice

In IS-IS, which type of router is responsible for routing between different areas and also maintains a Level 1 Link State Database?

Question 32mediummultiple choice

An SP network engineer configures IS-IS with wide metrics. Which statement is true about IS-IS wide metrics compared to narrow metrics?

Question 33hardmultiple choice

A service provider uses OSPFv3 for IPv6 routing in the core. Which statement correctly describes OSPFv3 adjacency formation on a broadcast multiaccess network?

Question 34mediummultiple choice

In BGP route selection, which attribute is considered before the MED when comparing routes from different ASes?

Question 35hardmultiple choice

A service provider wants to provide IPv6 connectivity over an MPLS IPv4 core using 6PE. Which BGP extension is required on the provider edge routers?

Question 36easymultiple choice

In IS-IS, what is the purpose of the Partial Route Computation (PRC)?

Question 37mediummultiple choice

Which OSPF area type does not allow external routes (Type 5 LSAs) but does allow inter-area routes and can have a default route injected?

Question 38hardmultiple choice

A service provider deploys BGP route reflectors in the core. Which mechanism prevents routing loops within the route reflector cluster?

Question 39easymultiple choice

Which IS-IS TLV is used to carry IPv6 reachability information?

Question 40mediummultiple choice

In OSPF Traffic Engineering (TE) extensions for RSVP-TE, which LSA type is used to carry TE information?

Question 41hardmultiple choice

A service provider wants to use BGP Prefix Independent Convergence (PIC) for faster failover. Which BGP feature must be enabled to support PIC?

Question 42mediummultiple choice

In BGP confederation, which attribute is used to prevent loops between sub-ASes?

Question 43mediummulti select

A service provider is designing an OSPF network with multiple areas. Which two area types prevent Type 5 LSAs from entering the area (choose two)?

Question 44mediummulti select

Which three BGP attributes are considered before the MED in the BGP best path selection process?

Question 45hardmulti select

An SP engineer configures IS-IS fast convergence mechanisms. Which three techniques help achieve sub-second convergence in IS-IS?

Question 46easymultiple choice

Which IS-IS level is used for routing within an area?

Question 47easymultiple choice

In OSPF, which type of area does not allow external routes and only accepts a default route?

Question 48mediummultiple choice

Which BGP attribute is used to influence inbound traffic to a specific AS by indicating the preferred path?

Question 49mediummultiple choice

In BGP route selection, which attribute is considered before LOCAL_PREF?

Question 50hardmultiple choice

In IS-IS, which TLV is used to carry traffic engineering information for MPLS-TE?

Question 51mediummultiple choice

Which OSPF adjacency type requires DR/BDR election on a multi-access network?

Question 52hardmultiple choice

A service provider wants to provide IPv6 connectivity over an existing MPLS IPv4 core using BGP extensions. Which technology should be used?

Question 53easymultiple choice

Which IS-IS metric type supports values up to 2^24-1 and is used for traffic engineering?

Question 54mediummultiple choice

Which BGP mechanism can reduce the number of iBGP sessions in a large SP network while preventing routing loops?

Question 55mediummultiple choice

In OSPFv3, which of the following is true about the protocol's operation?

Question 56hardmultiple choice

A service provider is implementing Segment Routing in an IS-IS network. Which TLV is used to advertise the Segment Routing Global Block (SRGB)?

Question 57easymultiple choice

Which OSPF area type can import external routes as Type 7 LSAs?

Question 58mediummulti select

A service provider is designing an OSPF network with multiple areas. Which two area types prevent Type 5 LSAs from being flooded? (Choose two.)

Question 59mediummulti select

Which three BGP attributes are considered during the route selection process before comparing AS_PATH length? (Choose three.)

Question 60hardmulti select

A service provider is deploying IPv6 transition mechanisms. Which three technologies use encapsulation over an IPv4 network? (Choose three.)

Question 61easymultiple choice

In IS-IS, which type of router is responsible for exchanging routing information between different areas?

Question 62mediummultiple choice

An SP network is migrating from IS-IS narrow metrics to wide metrics. What is a key advantage of using wide metrics?

Question 63hardmultiple choice

In OSPFv3 (for IPv6), which of the following statements is true regarding OSPFv3 packet format and authentication?

Question 64mediummultiple choice

In BGP route selection, if two routes have the same weight, local preference, and are both locally originated, which attribute is considered next?

Question 65mediummultiple choice

A service provider is implementing BGP PIC (Prefix Independent Convergence) for its core network. Which mechanism does BGP PIC primarily rely on to achieve fast convergence?

Question 66easymultiple choice

In IS-IS, what is the purpose of the NET (Network Entity Title) address field SEL (Selector) byte?

Question 67hardmultiple choice

Which OSPF area type is most suitable for a service provider's customer-facing network where external routes are blocked, but internal routes (including inter-area) are allowed, and the area should not accept Type 5 LSAs?

Question 68mediummultiple choice

In BGP, what is the purpose of the ORIGINATOR_ID attribute in a route reflector environment?

Question 69easymultiple choice

Which technology allows an IPv6-only customer edge router to connect to an MPLS provider edge router using IPv4 transport, encapsulating IPv6 packets in MPLS with a labeled IPv4 next-hop?

Question 70mediummultiple choice

An engineer is configuring IS-IS fast convergence. Which mechanism provides sub-second failure detection independently of the routing protocol?

Question 71hardmultiple choice

In OSPF TE extensions for RSVP-TE, which LSA type is used to carry TE information (such as link attributes) in OSPF?

Question 72easymultiple choice

Which BGP attribute is used to influence inbound traffic to a multi-homed AS by indicating the preferred entry point?

Question 73mediummulti select

A service provider is designing an OSPF network with multiple areas. Which TWO area types allow external routes (Type 5 LSAs) to be injected into the area? (Choose two.)

Question 74hardmulti select

Which THREE of the following are valid BGP extended community attributes? (Choose three.)

Question 75mediummulti select

An engineer is configuring BGP route reflectors to scale iBGP. Which TWO attributes are used to prevent routing loops in a route reflector cluster? (Choose two.)

Question 76easymultiple choice

Which IS-IS router type maintains a full Layer 2 routing table of all areas and can act as a gateway between areas?

Question 77mediummultiple choice

An SP engineer is designing an OSPF network with several remote sites that should not receive external routes but need to reach external destinations via a default route. Which OSPF area type best meets this requirement while also preventing Type 5 LSAs from entering?

Question 78hardmultiple choice

In BGP, an SP router receives multiple routes to the same prefix. The first route has a weight of 100, LOCAL_PREF of 200, AS_PATH length 3, and is learned via eBGP. The second route has weight 50, LOCAL_PREF 150, AS_PATH length 2, and is learned via iBGP. According to BGP route selection, which route will be preferred?

Question 79easymultiple choice

Which IS-IS TLV is used to carry Traffic Engineering (TE) information such as link bandwidth and TE metric in modern SP networks?

Question 80mediummultiple choice

A service provider is implementing 6PE to carry IPv6 traffic over an existing MPLS IPv4 core. Which BGP extension is required on the provider edge (PE) routers to exchange IPv6 prefixes with an IPv4 next-hop?

Question 81mediummultiple choice

An SP network uses OSPF with RSVP-TE for traffic engineering. Which OSPF extension is required to advertise TE link parameters such as maximum reservable bandwidth?

Question 82hardmultiple choice

In an IS-IS network, a service provider wants to achieve fast convergence using Partial Route Computation (PRC). Which of the following events triggers a PRC instead of a full SPF?

Question 83easymultiple choice

Which BGP attribute is used to indicate the preference of a route within an AS and is propagated to iBGP peers but not to eBGP peers by default?

Question 84mediummultiple choice

An SP network is implementing BGP PIC (Prefix Independent Convergence) for fast failover. What is the primary mechanism used by BGP PIC to achieve sub-second convergence?

Question 85easymultiple choice

In IS-IS, which type of metric uses 24 bits (wide) to allow higher link bandwidth values and is required for TE support?

Question 86hardmultiple choice

An SP is deploying NAT64 to allow IPv6-only clients to access IPv4 servers. Which address translation mechanism is used by NAT64 to map IPv6 addresses to IPv4 addresses?

Question 87mediummultiple choice

In BGP confederation, how does the AS_PATH attribute handle the confederation sub-AS numbers to prevent loops?

Question 88mediummulti select

A service provider is configuring BGP route reflectors to scale iBGP. Which two mechanisms are used to prevent routing loops in a route reflector environment? (Choose two.)

Question 89hardmulti select

An SP network uses OSPFv3 for IPv6 routing. Which three statements about OSPFv3 are true? (Choose three.)

Question 90mediummulti select

A service provider is implementing MAP-T (Mapping of Address and Port using Translation) to transition customers from IPv4 to IPv6. Which two characteristics of MAP-T are true? (Choose two.)

Question 91mediummultiple choice

A service provider is migrating from OSPF to IS-IS in the core network. They need to support Traffic Engineering and Segment Routing. Which IS-IS TLV must be supported to carry TE information?

Question 92easymultiple choice

In an OSPF network, an engineer wants to reduce the size of the routing table and prevent external routes from being advertised into an area. Which area type should be configured?

Question 93mediummultiple choice

A service provider uses BGP route reflectors to scale iBGP. A route reflected from a route reflector arrives at a client with the originator-id set. What is the purpose of the originator-id attribute?

Question 94hardmultiple choice

An ISP is implementing 6PE to provide IPv6 connectivity over an MPLS network that only supports IPv4 in the core. In 6PE, how are IPv6 prefixes carried across the MPLS backbone?

Question 95easymultiple choice

In IS-IS, what is the purpose of the System ID portion of the NET address?

Question 96mediummultiple choice

Which BGP attribute is used to influence inbound traffic to an AS by advertising a preferred path to a neighbor AS?

Question 97hardmultiple choice

A service provider is deploying BGP PIC (Prefix Independent Convergence) for edge routers. What is the primary benefit of BGP PIC?

Question 98mediummultiple choice

In OSPFv3, what change was introduced compared to OSPFv2 for supporting IPv6?

Question 99easymultiple choice

Which IS-IS metric type is required for traffic engineering and segment routing?

Question 100mediummultiple choice

A service provider wants to enable fast convergence for OSPF networks. Which feature should be enabled to detect link failures in sub-second time?

Question 101mediummultiple choice

In BGP route selection, when comparing two routes with the same LOCAL_PREF, which attribute is considered next?

Question 102hardmultiple choice

An ISP is implementing MAP-T to transition to IPv6. Which of the following best describes MAP-T?

Question 103mediummulti select

A service provider is designing an OSPF network for MPLS-TE. Which two OSPF LSA types are used to advertise Traffic Engineering information? (Choose two.)

Question 104mediummulti select

Which three BGP communities are standardized and commonly used for inter-AS traffic engineering? (Choose three.)

Question 105hardmulti select

An ISP is deploying BGP confederations to reduce iBGP mesh requirements. Which of the following statements about BGP confederations are true? (Choose two.)

Question 106easymultiple choice

What is the purpose of the SEL (NSAP Selector) field in an IS-IS NET address?

Question 107mediummultiple choice

An SP engineer is troubleshooting IS-IS routing. The network uses wide metrics, and some links have been configured with TE metrics. Which statement correctly describes the relationship between TE metrics and narrow metrics in IS-IS?

Question 108hardmultiple choice

In an OSPF network, an area is configured as a Not-So-Stubby Area (NSSA). Which statement about LSA types in this area is correct?

Question 109mediummultiple choice

An SP uses OSPF with Traffic Engineering extensions to support RSVP-TE. Which LSA type is used to carry TE information in OSPF?

Question 110easymultiple choice

In IS-IS, a router is configured as L1 only. Which statement is true regarding its routing table?

Question 111mediummultiple choice

Which BGP attribute is used to influence inbound traffic to an AS by indicating the preferred path into the AS?

Question 112hardmultiple choice

A service provider is deploying BGP PIC (Prefix Independent Convergence) to improve convergence after a link failure. Which mechanism does BGP PIC leverage to achieve fast failover?

Question 113mediummultiple choice

In OSPFv3, which statement correctly describes how OSPFv3 differs from OSPFv2 regarding router IDs and adjacencies?

Question 114easymultiple choice

Which BGP community is used to prevent a route from being advertised to any eBGP peers?

Question 115hardmultiple choice

An SP is deploying 6VPE (IPv6 L3VPN). Which BGP extensions are used to carry IPv6 VPN prefixes?

Question 116mediummulti select

Which TWO of the following are characteristics of IS-IS Partial Route Computation (PRC)? (Choose two.)

Question 117mediummulti select

Which TWO BGP attributes are considered during the best path selection process and can be used to influence outbound traffic from an AS? (Choose two.)

Question 118hardmulti select

Which THREE of the following are valid IS-IS TLV types used to support traffic engineering and segment routing? (Choose three.)

Question 119easymulti select

Which TWO of the following are types of OSPF stub areas? (Choose two.)

Question 120mediummulti select

A service provider is implementing BGP route reflectors to scale iBGP. Which THREE mechanisms are used to prevent routing loops in a route reflector topology? (Choose three.)

Question 121easymulti select

A service provider is deploying IS-IS with wide metrics to support traffic engineering. Which two statements about IS-IS wide metrics are correct?

Question 122mediummulti select

An SP network is running OSPFv3 for IPv6 and needs to support traffic engineering extensions for RSVP-TE. Which three statements about OSPFv3 TE extensions are true?

Question 123mediummulti select

An engineer is designing an iBGP route reflector topology to improve scalability. Which two statements about BGP route reflectors are correct?

Question 124hardmulti select

A service provider is implementing 6VPE to provide IPv6 L3VPN services. Which three statements about 6VPE are true?

Question 125easymulti select