QUESTION 61
Which type of BGP attribute does a route reflector attach to routes learned from iBGP peers that all.ws them to be accepted by other iBGP peers, thereby eliminating the need for a full-mesh BGP topology?

A. well-known discretionary
B. well-known mandatory
C. optional nontransitive
D. optional transitive

Correct Answer: C

QUESTION 62
What is the difference between basic IS-IS and OSPF packet types?

A. IS-IS and OSPF use area packets, but only IS-IS uses sequence number packets.
B. IS-IS and OSPF use link-state update packets, but only IS-IS uses DBD packets.
C. IS-IS and OSPF use Hello packets, but only OSPF uses DBD packets.
D. IS-IS and OSPF use link-state update packets, but only OSPF uses link-state ACK packets.

Correct Answer: C

QUESTION 63
While configuring Cisco NSF awareness, a network engineer enters the bgp graceful-restart command after the BGP session is established in a router that runs IOS XE Software. Graceful restart capabilities are not exchanged. Which two actions should be taken? (Choose two.)

A. Verify that BGP route dampening is configured.
B. Reduce BGP convergence time.
C. Issue the clear ip bgp * command.
D. Reload the router.
E. Issue the show ip bgp neighbors command.

Correct Answer: CD

QUESTION 64
Which difference must an engineer consider when choosing whether to implement OSPF or IS-IS as the routing protocol on the network?

A. IS-IS supports ordinary, stub, totally-stub, and NSSA areas, but OSPF supports only stub areas.
B. IS-IS links are associated with either a Level 1 area or a Level 2 area at one time, but OSPF links are associated with multiple areas at one time.
C. The OSPF DR election process is deterministic, and the IS-IS DS election process is not deterministic.
D. To support fast convergence, OSPF uses the LSA arrival timer and IS-IS uses the PRC-interval timer.

Correct Answer: D

QUESTION 65
Which cost is the default when redistributing routes from BGP to OSPF?

A. 20
B. 1
C. infinite
D. automatic

Correct Answer: B

QUESTION 66
Which command is used to enable BIDIR-PIM under global configuration mode for Cisco IOS XE Sofware?

A. ip pim bidir-enable
B. ipv4 pim bidir-enable
C. ip multicast-routing
D. ip pim bidir

Correct Answer: A

QUESTION 67
Which output from the show isis interface command helps an engineer troubleshoot an IS-IS adjacency problem on a Cisco IOS-XR platform?

A. metric
B. priority
C. circuit type
D. hello interval

Correct Answer: D

QUESTION 68
A network engineer is troubleshooting OSPF multiarea. Which Cisco IOS XR feature should the engineer use in order to streamline OSPF issue?

A. hierarchical CLI
B. DR support for topology management
C. routing process enabled by default on all interfaces
D. show ip ospf topology command

Correct Answer: A

QUESTION 69
For which reason can two BGP peers fail to establish a neighbor relationship?

A. Their BGP send-community strings are misconfigured
B. Their BGP timers are mismatched
C. Their remote-as numbers are misconfigured
D. They are both activated under an IPv4 address family

Correct Answer: C

QUESTION 70
In a PIM-SM environment, which mechanism determines the traffic that a receiver receives?

A. The receiver explicitly requests its desired traffic from the RP on the shared tree.
B. The receiver explicitly requests traffic from a single source, which responds by forwarding all traffic.
C. The RP on the shared tree floods traffic out of all PIM configured interfaces.
D. The receiver explicitly requests traffic from each desired source, which responds by sending all traffic.

Correct Answer: A

QUESTION 71
What is the feature of BFD on Cisco IOS XR Software?

A. Cisco IOS XR router must use LDP to route back to the Cisco IOS router to establish the peer relationship.
B. Cisco IOS XR Software does not support BFD multihop for IPv4.
C. Cisco IOS XR router must use dynamic routing or a static route back to the Cisco IOS router to establish the peer relationship.
D. BFD is not compatible between Cisco IOS XR and Cisco IOS Software.

Correct Answer: C

QUESTION 72
Which two routing protocols have extensions capable of running SRv6? (Choose two.)

A. OSPF
B. BGP
C. RIP
D. IGRP
E. EIGRP

Correct Answer: AB

QUESTION 73
Which are two characteristics unique to SSM when compared to ASM? (Choose two.)

A. It uses SPT switchover
B. It uses (*,G) exclusively
C. It uses IGMPv3
D. It uses RP
E. It uses (S,G) exclusively

Correct Answer: CE

QUESTION 74
What are two differences between OSPF and IS-IS? (Choose two.)

A. Unlike IS-IS routers, an OSPF router belongs to only one area in addition to the backbone area.
B. OSPF elects a DR and a BDR, and IS-IS elects a DIS.
C. OSPF uses a router ID to identify a router, and IS-IS uses a system ID.
D. Unlike OSPF, IS-IS supports Virtual inks.
E. SPF is a link-state routing protocol, and IS-IS is a distance-vector routing protocol.

Correct Answer: BC

QUESTION 75
An engineer is troubleshooting slow performance issues on a customer’s network after the last multicast configuration change was applied on it. While checking the running configuration on the router, the engineer notices there are many ip igmp join-group commands applied on several interfaces of the router which caused the high CPU utilization usage. What action must the engineer take to solve this issue?

A. Remove ip igmp join-group command on all unnecessary interfaces.
B. Configure all router interfaces to be process switched by increasing the query interval.
C. Configure ip igmp static-group command on all interfaces.
D. Remove unnecessary members from the IGMP group.

Correct Answer: C

QUESTION 76
A network consultant is troubleshooting IS-IS instances to identify why a routing domains is having communication problems between the two instances. What is the description of the possible cause of issues in the routing domain?

A. The same interface cannot be advertised in two different IS-IS instances
B. The IS-IS “ISP” and “ISP2” instances are unrelated and unable to intercommunicate
C. The configured IS-IS NSEL value is not allowing the routing systems to establish a neighborship
D. The interface mode ip router is-is command was not included in the script

Correct Answer: A

QUESTION 77
What is used by SR-TE to steer traffic through the network?

A. shortest path calculated by IGP
B. dynamic rules
C. path policy
D. explicit maps

Correct Answer: C

QUESTION 78
For which reason can two devices fail to establish an OSPF neighbor relationship?

A. The two devices have different process IDs
B. The two devices have different network types
C. The two devices have different router IDs
D. The two devices have the same area ID

Correct Answer: B

QUESTION 79
Which statement about enabling segment routing for IGPs is true?

A. Segment routing must first be enabled under then routing process and then globally
B. Segment routing must first be enabled globally and then under the routing process
C. Segment routing can be enabled only under the routing process
D. Segment routing can be enabled only globally

Correct Answer: B

QUESTION 80
Which two conditions must be met before separate ISPs can provide interdomain multicast routing? (Choose two.)

A. Each ISP must configure MSDP to connect its individual multicast administrative domain to the domains at other ISPs.
B. Each ISP must dedicate a single router to handle multicast traffic between providers.
C. Each ISP must replace its RP assignment with a global RP.
D. Each ISP must configure its network to use PIM-DM.
E. Each ISP must support intradomain multicast routing.

Correct Answer: AE