Free 300-510 Practice Test Questions 2026

Refer to the exhibit.

The extension header of the IPv6 header is ignored when which value is equal to zero?

A. Segments Left

B. Hdr Ext Len

C. Routing Type

D. Next Header

Refer to the exhibit.

The four routers in this network have formed adjacencies. Router R2 is an IS-IS level 1-2 router that connects to other areas, and the attach bit is set in the R2 level 1 LSP advertisements to R1. According to the network design, R2 should push level 2 routes from its routing table to the R1 routing table. However, R1 installed a default route in its routing table. Which action resolves this problem?

A. Use The is-type level-1-2 backdoor command lo unset the attach bit on R1 and use a prefix List to filter prefixes from R2

B. Set the attach bit on R1and use a prefix list to filter prefixes from R2.

C. Use the is-type level-1-2 backdoor command to unset the attach bit on R2 and configure a distribute-list to redistribute prefixes to R1

D. Configure R2 as a level 1 router and use a prefix list to filter prefixes to R1.

Refer to the exhibit.

OSPF is running in the core of a company. Router RA is running EIGRP. After the company acquired an additional office, an engineering team connected the two networks from router RA to router R1. OSPF and EIGRP have been mutually redistributed on R1. but the team cannot view the routes on R3. Which action must the team take to resolve the issue?

A. Create a virtual link between R1 and R2.

B. Configure the routers in Area 2 to be in Area 0.

C. Disable stub routing in Area 1.

D. Redistribute connected routes on R3.

Refer to the exhibit.

The Cisco router has a single uplink to the upstream network, which is critical to the business. The router is configured for traffic steering with the Autoroute mechanism configured to steer all OSPF and IS-IS prefixes over non-shortest paths and divert traffic for those prefixes to the SR-TE policy. However, the Autoroute Announce functionality for all prefixes is not working. Which additional command set must the engineer configure on the router to correct this issue?

A. Option A

B. Option B

C. Option C

D. Option D

An ISP has an MPLS VPN-based network with 12 PE routers. How many peerings are required between the 12 routers if the engineer has not configured route reflectors?

A. 60

B. 66

C. 78

D. 84

Refer to the exhibit.

A network engineer is configuring router R3 to handle multicast streams, but Host-2 cannot send subscriptions messages to the IPTV source. Which configuration must the engineer apply to router R3 so it passes the IPTV stream to Host-2?

A. Option A

B. Option B

C. Option C

D. Option D

Refer to the exhibit.

Routers within the cluster are not receiving the desired prefixes. What must be done to fix the issue?

A. Clients in that cluster must have full mesh connectivity between eBGP peers.

B. No client-to-client must be disabled.

C. Clients in that cluster must have full mesh connectivity between iBGP peers.

D. No client-to-client reflection must be enabled.

Refer to the exhibit.

After troubleshooting BGP traffic steering issue, which action did the network operator take to achieve the correct effect of this configuration?

A. Routes that have passed through AS 65517 have the local preference set to 150.

B. Routes that have originated through AS 65517 have the local preference set to 150.

C. Routes directly attached to AS 65517 have the local preference set to 150.

D. Routes that have passed through AS 65517 have the local preference set to 150 and the traffic is denied.

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

An engineer configured OSPF on all routers in the data center in the same exchange as other routers Layer 2 connectivity was established. Now, the engineer plans to implement BFD to detect failures in the forwarding path. Which action must the engineer take?

A. Configure BFD on any one of the routers

B. Configure IS-IS routing before implementing BFD.

C. Configure BFD between each adjacent router

D. Configure CEF before implementing BFD

Which fact must a network architect consider when implementing IGMP in a multicast routing environment?

A. If SSM is in use IGMPv3 must be enabled

B. If BISS support is required IGMPv2 must be enabled

C. If leave latency is critical IGMPv3 must be enabled

D. If PIM-DM is required, IGMPv2 must be enabled

What Is a characteristic of a segment routing mapping server?

A. It must be placed in the core of the network.

B. It serves multiple VRFs.

C. It must have an IGP adjacency.

D. It applies SID mappings from one IGP instance to another IGP instance.