300-510 Online Practice Questions and Answers

Which task is performed when troubleshooting LDP?

A. Execute the ping utility to generate information about the MAC addresses used along the path

B. Verify that MPLS is disabled globally and enabled on the necessary interfaces in a per-interface basis

C. Execute the traceroute utility to generate information about the labels used along the path

D. Verify that Cisco Express Forwarding has been disabled on the network

What must occur before an (S,G) entry can be populated in the multicast routing table?

A. The (*,G) entry must have timed out

B. The (*,G) entry OIL must be null

C. The router must be directly connected to the multicast source

D. The parent (*,G) entry must be created first

Which statement about BFD on Cisco IOS XR Software is true?

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.

Refer to the exhibit. Routers RA and RB are IS-IS peers configured for NSF, but router RC is an IS-IS peer without NSF capability. If RA undergoes processor switchover, what is the effect on the network environment?

A. If RC is operating without the Cisco configuration option, only 2 routers tear down their peering relationships and re-establish peering

B. All peer relationships remain up, but the link-state database is rebuild on each device

C. If RC is operating without the Cisco configuration option, all three routers tear down their peering relationships and re-establish peering

D. All peer relationships remain up and the link-state database is unchanged

What is the purpose of ACL type prefix set entries in RPL prefix sets?

A. They hold IPv4 or IPv6 prefixes that do not match specifications.

B. They hold IPv4 or IPv6 prefix match specifications.

C. They hold IPv6 prefix match specifications.

D. They hold IPv4 prefixes that do not match specifications.

Refer to the exhibit.

R21 is a multicast source sending multicast traffic 224.1.1.1 to R23, with RP22 serving as the rendezvous point inside AS65222.

A network engineer noticed that when R21 goes down, R12 in AS65111 starts to send the same multicast group 224.1.1.1 through RP11.

Which action resolves the issue ?

A. Block service groups 224.0.1.39 and 224.0.1.40 between the two autonomous systems

B. Disable PIM parse mode between RP11 and RP22 in the two autonomous systems.

C. Advertise RP2 with a high local preference in AS65222.

D. Enable passive intertaoe under EIGRP between the two autonomous systems.

Refer to the exhibit.

After a recent network implementation project, customer A is performing stress testing to verify network redundancy at the branch office connected to R4.

When the link from R2 is shut down as shown, the SLA tracking object fails and the cost of the link between R2 and R4 increases to 100. However, a traceroute operation from a PC in the Branch office shows that traffic to HQ is still routed via

R2.

Which solution corrects the problem and optimizes traffic flow via R3 without creating operational overhead?

A. Configure two OSPF processes on R2 and R3 and redistribute traffic between them.

B. Redistribute routes from BGP to OSPF as type El.

C. Use multiarea adjacency to extend Area 10 to the link between R2 and R3.

D. Create a virtual channel from R3 to R4.

Refer to the exhibit.

CE1 and CE2 use connectivity over the service provider cloud to reach CE3 In the event of a link failure in the service provider cloud which BGP feature relies on IGP convergence to quickly assist in the installation of a backup path?

A. BGP graceful restart

B. BGP route dampening

C. BGP PIC core

D. BGP confederations

Refer to the exhibit.

A network engineer configured routers R1 and R5 to run in IS-IS Level 1 mode and router R6 to run in IS-IS Level 2 mode. All other routers are running as Level 1 / Level 2 routers. An engineer expects traffic from R1 to R6 to pass via R2, but IS-IS routing has calculated the best path via R4. Which action corrects the problem?

A. Configure all routers as Level 1 routers.

B. Remove the link metric for the link from router R1 to router R2.

C. Change the link metric for the link from router R1 to router R2 to 1.

D. Configure all routers as Level 1 / Level 2 routers.

Refer to the exhibit.

An engineer working on a client's network is trying to solve the BGP community issue on R1 and R2 routers. After displaying the BGP entries, the engineer notices that both routers still have different outputs. Which action must the engineer perform to any of the routers to correct the problem and get the same output?

A. Execute the lp bgp-community new-format command in Router1.

B. Remove the lp bgp-community new-format command in Router1.

C. Advertise the route to Router2 as standard community.

D. Advertise the route to Router2 as extended community.