Free 300-510 Practice Test Questions 2026

An engineer is troubleshooting end-to-end customer traffic across an MPLS VPN service provider network. Which tasks should the engineer use to solve the routing issues? Drag and drop the table types from the left onto the most useful troubleshooting tasks/router types on the right. (Not all options are used.)

Refer to the exhibit.

Routers CE1 and CE2 are in AS 65530. which is multihomed for Internet access. An engineer expects inbound traffic to AS 65530 to arrive from PE1. but it is coming from PE2 instead PE1 and PE2 routers are connected with CE routers through the same bandwidth Which action must be taken to correct the problem?

A. On router CE2, configure inbound routes from PE2 to CE2 with a local-preference value of 50 or greater.

B. Configure router CEI to prepend the AS path to routes it receives from PE 1.

C. Set the local-preference value on router CEI to 100 or greater

D. On router PEI , change the origin for routes that are redistributed from CEI to CE2.

Refer to the exhibit.

An engineer working for a private telecommunication company with an employee id 3977 74 814 implemented the configuration on Router 1. what is the effect of it?

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

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

C. Router 1 sends only one best path to neighbor 192 168.1.1.

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

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 OSPF uses link-state ACK 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 IS-IS uses DBD packets.

An engineer is troubleshooting a connectivity issue across the MPLS network and is verifying the forwarding behavior of packets. Which table does the engineer look at to verify the forwarding behavior of an IP packet as it enters the MPLS network at the ingress LSR?

A. LFIB

B. LIB

C. RIB

D. FIB

What is a requirement of PIM-SM?

A. It requires Cisco Express Forwarding to be enabled.

B. It must be enabled on loopback interfaces only

C. It requires OSPF to be configured on the network.

D. It must use an RP

What is the purpose of a BGP confederation?

A. It limits the number of routes a device receives from its peers, which reduces CPU load.

B. It improves service by increasing the number of simultaneous iBGP peering sessions.

C. It redirects traffic away from route reflectors, which reduces their operating load.

D. . It reduces the number of iBGP peers and increases stability.

Refer to the exhibit.

IS-IS is the IGP for the network, where routers R1. R2 R3, and R4 are Level 1 routers in Area 12 and routers R5 and R6 are Level 2 routers m area 16 According to the network design router R1 must send traffic to R6 using R4 as its next hop To meet the requirement, a network engineer configured route filtering on R2 to prevent the route to R6 from being advertised from R2 However R1 is still using R2 as the next hop Which action must the engineer take to resolve the issue?

A. Disable wide area metrics and use only cost to perform the route manipulation.

B. Manipulate link costs to provide the desired routing through R4

C. Move all routers into the same IS-IS area

D. Configure routers R5 and R6 as Level 1/2 routers

Refer to the exhibit.

After configuring IS-IS on routers R1 and R2, an engineer notices that only the loopback interface at 2000:1::1 /96 is known to router R2. Which change must be made so that only Loopback2 is advertised from R1 to R2?

A. Configure the router isis areal command under the LoopbackO interface on R1.

B. Remove the advertise passive-only command under the IS-IS address family ipv6 configuration

C. Remove the ipv6 router isis areal command under the Loopback2 interface on R1.

D. Remove the passive-interface Loopback0 command under the router isis areal configuration.

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

Refer to the exhibit.

A network operator is getting the route for 10.11.11 0/24 from two upstream providers on #XR3. The network operator must configure #XR3 to force the 10.11.11.0/24 prefix to route via next hop of 10.0.0.9 as primary when available. Which of these can the operator use the routing policy language for, to enforce this traffic forwarding path?

A. weight of 0 on the prefix coming from 192.168.0.2

B. lower local preference on the prefix coming from 192.168.0.2

C. higher local preference on the prefix coming from 192.168.0.1

D. weight of 100 on the prefix coming from 192.168.0.1

Which expression, when used with the as-path-set command, matches the AS path attribute of the route?

A. neighbor-is

B. dfa-regtex

C. ios-regex

D. Length