300-510 Online Practice Questions and Answers

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

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

Refer to the exhibit.

While configuring router 2 with all the default values, a network engineer cannot see any route received in router 1. How should the engineer solve the issue?

A. Set up a priority different than 0 in the interface.

B. Modify the router ID to be the interface IP on the serial.

C. Modify the IP address or mask of the interface to a valid one.

D. Set the network type in S1/0 to point-to-point.

An engineer is working to implement segment routing protocol on the customer's core network. Which step should the engineer take before the segment routing is enabled and is running with BGP?

A. Segment routing must be configured with ISIS.

B. Segment routing must be configured with EIGRP.

C. Explicit-null must be configured for all neighbors.

D. MPLS must be configured.

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. Configure all router interfaces to be process-switched by increasing the query interval

B. Remove ip igmp join-group command on all unnecessary interfaces

C. Remove unnecessary members from the IGMP group

D. Configure ip igmp static-group command on all interfaces

Refer to the exhibit.

A network engineer is investigating a report of packet drops between the branch site and the central site.

The two sites are connected via OSPF and RSVP-TE tunnels. Traffic from the central site to the branch site is passing normally. Technicians at both sites successfully ping the loopback IP addresses on routers R1 and R2.

Which configuration corrects the packet-drop problem?

A. Option A

B. Option B

C. Option C

D. Option D

Refer to the exhibit.

Network connectivity between bank A and bank B has been lost Users at bank A and bank B are able to successfully reach their directly connected PE routers.

All routers in OSPF area 0 are correctly advertising and learning routing updates.

Which action resolves the issue?

A. Enable next-hop-self under the iBGP peering configuration on routers PEI and PE2

B. Configure the P routers to redtstnbute BGP routes within OSPF area 0.

C. Configure router PI to advertise the IP prefix of PEI.

D. Configure MPLS with an end-to-end label-switched path on each router.

Refer to the exhibit.

MPLS traffic from 192.168.4.0/24 to 192.168.5.0/24 is failing to pass over the link from R4 to R2. The engineer verified that:

1.

Cisco Express Forwarding Is enabled on all routers.

2.

All routers reach all networks via OSPF.

3.

MPLS traffic from 192.168.1.0/24 to 192.168.3.0/24 is passing normally over the link from R1 to R2. Which action resolves the issue?

A. On router R4, remove the mpls ip command on the s/O/O/2 interface.

B. On router R2, configure the mpls ip command on the SIO/O/4 interface.

C. On router R4, configure the mpls label protocol Idp command on all serial interfaces.

D. On router R2, configure the mpls label protocol Idp command on the interface.

How does SRv6 function on the control plane?

A. It enables SRH-capable nodes to terminate IPv6 packets at the network egress to carry the SRv6 locator.

B. The Ingress node of the SR domain adds a uSlD format IPv6 header to carry the SRv6 locator.

C. The ingress node of the SR domain swaps the SRv6 header for the IPv6 header

D. The egress node of SR domain imposes a new outer header

Refer to the exhibit

The branch office in area 10 is connected to HQ via Frame Relay uplinks with bandwidth constraints After a recent implementation of QoS on the R2 and R3 networks the system has been logging %SYS-2-MALLOCFAIL: Memory allocation of 65536 bytes failed from 0x224E321, alignment 0 messages To reduce traffic load and memory utilization on R2 and R3 the network engineer configured R1 to announce only one user subnet per location by issuing the summary address 192.168.0.0 255.255.248.0 command en R1 However, the

engineer noticed that router R2 still has two routes and a summary address from HQ and R3 also has two routes from HQ Which two actions must the engineer take on R1 to fix the issue so that only one route is announced' (Choose two.)

A. Configure the subnet range with the network command under the IS-IS process.

B. Configure RI as a Level 1 device.

C. Redistribute both routes into the ISIS process.

D. Configure a summary route for Level 1-Level 2 devices.

E. Configure a summary route for Level 1 devices.

Refer to the exhibit.

An engineer is troubleshooting IS-IS configuration between two areas. IS-IS Area-A network 30.1.1.0/24 is leaked into IS-IS Area-. R2 is failing to filter the route updates from network 10.1.1.0/24. Which configuration must the engineer apply to resolve the issue?

A. R2(config)# ip prefix-list List2 seq 5 deny 10.1.1.0/24 R2(config)# interface fastethernet 0/0 R2(config-if)# ip router isis 100 R2(config-if)# router isis 100 R2(config-router)# distribute-list gateway List2 in

B. R2(config)# ip prefix-list List1 seq 3 deny 10.1.1.0/24 R2(config)# ip prefix-list List1 seq 5 permit 30.1.1.0/24 ge 25 1e R2(config)# ip prefix-list List1 seq 10 permit 0.0.0.0/le 32 R2(config)# interface fastethernet 0/0 R2(config-if)# ip router isis 122 R2(config-if)# router isis 122 R2(config-router)# distribute-list prefix List1 in

C. R1(config)# ip prefix-list List2 seq 5 deny 10.1.1.0/24 R1(config)# interface fastethernet 0/0 R1(config-if)# ip router isis 100 R1(config-if)# router isis 100 R1(config-router)# distribute-list gateway List2 in R (config-if)# router isis 150 R1(config-router)# distribute-list route-map Map1 in

D. R2(config)# access-list 101 deny ip any 10.1.1.0 0.0.0.127 R2(config)# access-list 101 permit ip any 30.1.1.0 0.0.0.63 R2(config)# access-list 101 deny ip any 0.0.0.0 0.0.0.0 R2(config)# interface fastethernet 0/0 R2(config-if)# ip router isis 121 R2(config-if)# router isis 121 R2(config-router)# distribute-list 101 in

Refer to the exhibit.

An engineer is troubleshooting connectivity issues on the MPLS core network. A customer connected through R4 cannot reach the OSPF domain on R5. While checking the routing table of R1, the engineer cannot see all the routes from R3 and R5. Which task must the engineer perform so that R4 is able to reach R5?

A. Enable OSPF peering and configure route redistribution between routers R4 and R1.

B. Enable route filtering between routers R1 and R3.

C. Enable MP-BGP peering on routers R1, R3, R4, and R5.

D. Enable OSPF on the Area-0 routers and configure MP-BGP between routers R1 and R3.

Refer to the exhibit.

When implementing SRv6, which SID does R2 propagate into area 0 for the prefix 2001:DB8:1:1/128?

A. 120

B. 230

C. 110

D. 10

Refer to the exhibit

An engineer is configuring service traffic from router R1 to R6 as shown. Which additional configuration must the engineer implement so that the LDP and SR domains will participate and interwork with each other?

A. Router2(config)# segment-routing Router2(config-sr)# ldp mapping-server Router2(config-sr-ms)# prefix-sid-map Router2(config-sr-ms-map)# Router2(config-sr-ms-map-af)# 2.2.2.2/32 500 range 4

B. Router2(config)# segment-routing Router2(config-sr)# sr mapping-server Router2(config-sr-ms)# ldp-sid-map Router2(config-sr-ms-map)# address-family ipv4 Router2(config-sr-ms-map-af)# 10.1.1.1/32 500 range 50

C. Router2(config)# segment-routing Router2(config-sr)# mapping-server Router2(config-sr-ms)# prefix-sid-map Router2(config-sr-ms-map)# address-family ipv4 Router2(config-sr-ms-map-af)# 10.1.1.1/32 500 range 50

D. Router2(config)# segment-routing Router2(config-sr)# ldp mapping-server Router2(config-sr-ms)# prefix-sid-map Router2(config-sr-ms-map)# address-family ipv4 Router2(config-sr-ms-map-af)# 2.2.2.2/32 500 range 40

CORRECT TEXT

A. Check the answer in the explanation

B. Placeholder

C. Placeholder

D. Placeholder