Free 300-510 Practice Test Questions 2026

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

A. ip pim bidir ip

B. multicast-routing

C. ipv4 pim bidir-enable

D. Ip pim bidlr-enable

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

A. 20

B. 1

C. infinite

D. automatic

STION NO: 82

Refer to the exhibit.

After maintenance to activate BGP neighbors connecting a new data center attached to R1, L3VPN customers attached to OSPF domain 100 lost connectivity to services in OSPF 200 and OSPF 300 However Unified MPLS services within OSPF 100 remain reachable Which action must the network engineer take to resolve the outage

A. Reset the BGP session between R1 and R2

B. Activate BGP neighbors between the new data center and R2 and R3

C. Establish new MPLS LSPs from R1 to R2, R3 and R4

D. Raise the maximum prefix limit on R2 to 1560 or more

What is a feature of SR-PCE?

A. It learns the topology information via OSPF or IS-IS only

B. It learns the topology information via OSPF or IS-IS or through BGP-LS.

C. It uses the IGP metric in its path calculations to optimize reachability.

D. It uses the TE metric in its calculations to optimize the cumulative TE metric

You have configured MSDP peering between two autonomous systems that pass traffic between two sites, but the peering has failed to come up.
Which task do you perform to begin troubleshooting the problem?

A. Verify that multicast has been disabled globally

B. Verify that PIM-DM is configured on the source interface

C. Verify that both source interfaces are reachable from both peers

D. Verify that the two MSDP peers allow asymmetric routing

Refer to the exhibit.

Which statement about this configuration is true?

A. Router 1 sends and receives multiple best paths from neighbor 192.168.1.1

B. Router 1 sends up to two paths to neighbor 192.168.1.1 for all routes

C. Router 1 receives up to two paths from neighbor 192.168.1.1 for all routes in the same AS

D. Router 1 receives only the best path from neighbor 192.168.1.1

Refer to the exhibit.

Traffic flow from router R1 to router R6 is delay-sensitive It must consider potential link failure and node-failure conditions Which configuration must an engineer apply to router R1 to route traffic to router R6 if router R2 fails?

A. Option A

B. Option B

C. Option C

D. Option D

What is the difference between a source tree and a shared tree in a multicast environment?

A. To route traffic from source to receiver a source tree uses a link-state routing protocol and a shared tree uses a distance-vector routing protocol.

B. A source tree has its root at the source, and a shared tree has its root at a designated rendezvous point.

C. To stream multicast from source to receiver, a source tree uses PIM-SM and a shared tree uses PIM-DM.

D. Source trees are the default type for bidirectional PIM. and PIM-DM uses shared trees by default.

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 Ip bgp-community new-format command in Router1.

B. Remove the Ip 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.

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.

A network engineer must optimize link failures on the OSPF routing domain. The solution must follow RFC 5286. and downtime must be no more than 50 ms. All known subnets on R1 must be protected. Which solution must the engineer implement on R1?

A. Configure fp ospf frr per-prefix candidate enable high under the interface configuration.

B. Configure Ip ospf fast-reroute per-prefix candidate enable under the interface configuration.

C. Configure fast-reroute per-prefix enable prefix-priority low under the global OSPF configuration.

D. Configure frr per-prefix enable priority high under the global OSPF configuration.

Refer to the exhibit.

Which task must you perform on interface g1/0/0 to complete the SSM implementation?

A. configure OSPFv3

B. enable CDP

C. disable IGMP

D. configure IGMPv3