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300-510 Practice Test Free

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  • 300-510 Practice Test Free – 50 Real Exam Questions to Boost Your Confidence
  • Free Access Full 300-510 Practice Test Free Questions

300-510 Practice Test Free – 50 Real Exam Questions to Boost Your Confidence

Preparing for the 300-510 exam? Start with our 300-510 Practice Test Free – a set of 50 high-quality, exam-style questions crafted to help you assess your knowledge and improve your chances of passing on the first try.

Taking a 300-510 practice test free is one of the smartest ways to:

  • Get familiar with the real exam format and question types
  • Evaluate your strengths and spot knowledge gaps
  • Gain the confidence you need to succeed on exam day

Below, you will find 50 free 300-510 practice questions to help you prepare for the exam. These questions are designed to reflect the real exam structure and difficulty level. You can click on each Question to explore the details.

Question 1

In a PIM-SM environment, which mechanism determines the traffic that a receiver receives?

A. The receiver explicitly requests its desired traffic from the RP on the shared tree.

B. The receiver explicitly requests traffic from a single source, which responds by forwarding all traffic.

C. The RP on the shared tree floods traffic out of all PIM configured interfaces.

D. The receiver explicitly requests traffic from each desired source, which responds by sending all traffic.

 


Suggested Answer: D

 

Question 2

Refer to the exhibit.
 Image
A network consultant is updating the company’s MPLS solution and configuring several new PE devices to enable full communication among PE devices connected to the network. The updates must ensure the redundancy and scalability of the network. The egress LSR is configured with mpls ldp explicit-null. While configuring the given PE router to be adjacent to the egress LSR, the consultant notices that MPLS forwarding is not working in the network. Which action resolves the issue?

A. Open TCP and UDP ports 179.

B. Configure Cisco Express Forwarding on all routers in the MPLS network.

C. Configure MVRF on all routers in the MPLS network.

D. Open TCP and UDP ports 464.

 


Suggested Answer: B

 

Question 3

Image
Refer to the exhibit. After troubleshooting an OSPF adjacency issue, routers 1, 2, and 3 have formed OSPF neighbor relationships. Which statement about the configuration is true?

A. Router 2 receives a Type 5 LSAs from router 1 for its connected subnets

B. Router 2 uses router 3 as the next hop for 192.168.0.0/24

C. Router 2 uses router 1 as the next hop for 192.168.0.0/24

D. Router 2 receives a Type 7 LSAs from router 3 for its connected subnets

 


Suggested Answer: A

 

Question 4

Image
Refer to the exhibit. A network operator is configuring BGP PIC on CE1 on already established neighborships with PE1 and PE2 inside the fully converged MPLS network. Which element needs to be implemented to make this feature function effectively?

A. Bidirectional Forwarding Detection must be applied to the upstream facing BGP interfaces

B. The operator must ensure that all prefixes have the same next-hop from PE1 and PE2 for BGP PIC

C. A reserved BGP community of 1:10 must be used to denote the PIC feature set to the routing protocol

D. BGP import/export policies must be applied on all devices for the routes needing BGP for PIC

 


Suggested Answer: A

 

Question 5

Image
Refer to the exhibit. A network engineer installed a new router (Router 3) at the regional hub running MPLS services for scalability. Router 3 is connected to the 10.44.4.0/24, 10.44.5.0/24, 10.44.6.0/24, and 10.44.7.0/24 subnets. The new router has been configured for OSPF Area 2, and it is advertising the four connected networks. The engineer noticed that the same networks are listed as interarea summary routes, and they are being flooded into each area on the area borders. Which action resolves the issue?

A. Under the OSPF configuration on Router 2, add area 2 range 10.44.4.0 255.255.252.0.

B. On Router 3, configure an access list to filter the networks.

C. Under the OSPF configuration on Router 3, add area 2 range 10.44.4.0 255.255.252.0.

D. On Router 2, configure a route map to filter the networks.

 


Suggested Answer: A

 

Question 6

After an engineer configures BGP in R1, it starts receiving this message:
 Image
Which action makes the peering come back up again?

A. Make a soft reset to the peer

B. Set up a hello timer higher

C. Set up a hold-down timer higher

D. Set up a minimum hold-down timer higher

 


Suggested Answer: D

 

Question 7

Image
Refer to the exhibit. A network engineer sets up a multihoming eBGP topology where multiple Autonomous Systems connect to ASN 64501. The engineer wants to block all the routes coming from ASN 64502 but allow all the others. For that purpose, the following AS Path prefix list is being used:
(config)#ip as-path access-list 10 deny _64502$
What must be fixed to achieve this result?

A. The AS-PATH filter must be defined inside the route-map mode

B. The statement must be modified with ip as-path access-list 1 deny_64502_

C. The statement must be modified with ip as-path access-list 1 deny ^64502$

D. At the end, ip as-path access-list 10 permit.* must be included

 


Suggested Answer: D

 

Question 8

Refer to the exhibit.
 Image
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.

 


Suggested Answer: C

 

Question 9

Which difference must an engineer consider when implementing inter-domain and intra-domain multicast routing on the network?

A. Intra-domain routing is dependent on the RP router within the same SP network, but inter-domain routing reduces the dependency on the other SP network.

B. Intra-domain routing allows the service provider to control incoming and outgoing multicast data streams on its network, but inter-domain routing limits the service provider’s control.

C. Inter-domain routing supports policy routing to connect different multicast domains using PIM-SM, but intra-domain routing supports policy routing using PIM-SM only within a single domain.

D. Intra-domain routing uses the PIM and MBGP protocols for multicast routing, but inter-domain routing must use PIM-SSM or MSDP.

 


Suggested Answer: A

 

Question 10

Image
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

 


Suggested Answer: C

 

Question 11

Refer to the exhibit.
 Image
 Image
VPN users that are connected to PE routers are facing network issues. Traffic that originates from CE1 drops before reaching CE2. An engineer finds no outgoing traffic statistics on PE1 and PE2 routers toward CE devices and finds that the PE1 router is running the older software image. Which action must be implemented to resolve the issues?

A. Enable LDP protocol on PE1 and PE2 routers.

B. Advertise P1 router loopback on PE1 in OSPF.

C. Enable CEF-based forwarding on PE1 router.

D. Advertise PE2 router loopback on PE1 in OSPF.

 


Suggested Answer: C

 

Question 12

Image
Refer to the exhibit. There is a connectivity issue between Customer-1 and Customer-2. File servers between the customers cannot send critical data. R3 routes are missing from the routing table on the Customer-1 router. All interfaces on Customer-1 are up. Which configuration must be applied to router R2 to correct the problem?

A.
Image

B.
Image

C.
Image

D.
Image

 


Suggested Answer: A

 

Question 13

Image
Refer to the exhibit. There is a BGP traffic path issue between Customer-1 and Customer-2. Users from Customer-2 have reported file transfer issues. High utilization on the path between both customers causes many packet drops. Which configuration resolves the issue?

A. R4#router bgp 65504 -neighbor 10.0.23.3 remote-as 65501neighbor 10.0.23.3 filter-list 1 outip as-path access-list 1 deny ^65505$ip as-path access-list 1 permit .*

B. R4#router bgp 65504 -address-family ipv4 unicastneighbor 10.0.23.3 remote-as 65501neighbor 10.0.23.3 activateneighbor 10.0.23.3 route-map PREPEND inexit-address-familyexitroute-map PREPEND permit 10set as-path prepend 65506 65507

C. R1#neighbor 10.0.23.3 route-map LOCAL-PREF-150 outroute-map LOCAL-PREF-150set local-preference 150

D. R1#neighbor 10.0.24.4 route-map LOCAL-PREF-150 inroute-map LOCAL-PREF-150set local-preference 150ip prefix-list 5-5-5-S seq 5 permit 5.5.5.5/32route-map LOCAL-PREF-150 permit 10match ip address prefix-list 5-S-5-5set local-preference 150

 


Suggested Answer: A

 

Question 14

A network operator working for a telecommunication company with an employee id: 4074:92:707 is planning to implement the Nonstop Forwarding (NSR) feature on the customer’s core network. After getting the configuration ready for NSR. on which router should the operator implement NSR changes?

A. on the CE router

B. on the ASBR router

C. on the ABR router

D. on the PE router

 


Suggested Answer: D

 

Question 15

Image
Refer to the exhibit. A network engineer configured three new PE routers to expand the network. The new routers run the IS-IS routing protocol and reside in the data center in the same exchange as the existing routers. However, the network is now experiencing suboptimal routing. The Layer 2 configuration and VLANs are configured correctly to provide segregation between networks, but the Level 1 routes are not being converted to Level 2 routes. Which action resolves the issue?

A. On Router 1, redistribute the routes into IGP.

B. On Router 2, redistribute the routes into IGP.

C. On Router 1, summarize internal routes between areas.

D. On Router 2, summarize internal routes between areas.

 


Suggested Answer: D

 

Question 16

SIMULATION
-
Guidelines
-
This is a lab item in which tasks will be performed on virtual devices.
•	Refer to the Tasks tab to view the tasks for this lab item.
•	Refer to the Topology tab to access the device console(s) and perform the tasks.
•	Console access is available for all required devices by clicking the device icon or using the tab(s) above the console window.
•	All necessary preconfigurations have been applied.
•	Do not change the enable password or hostname for any device.
•	Save your configurations to NVRAM before moving to the next item.
•	Click Next at the bottom of the screen to submit this lab and move to the next question.
•	When Next is clicked, the lab doses and cannot be reopened.
Topology
-
 Image
Tasks
-
Configure and verify an OSPF neighbor adjacency between R1 and R2 in OSPF area 0 according to the topology to achieve these goals:
1. R1 pings the Loopback0 interface of R2. Use interface-level configuration to complete this task.
2. R2 pings the Loopback0 interface of R1. Use interface-level configuration to complete this task.
3. R2 receives a single summary route 172.16.100.0/22 for networks 172.16.100.0/24, 172.16.101.0/24, and 172.16.103.0/24.

 


Suggested Answer:
Correct Answer Image
Correct Answer Image

 

Question 17

Refer to the exhibit.
 Image
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-routingRouter2(config-sr)# ldp mapping-serverRouter2(config-sr-ms)# prefix-sid-mapRouter2(config-sr-ms-map)#Router2(config-sr-ms-map-af)# 2.2.2.2/32 500 range 4

B. Router2(config)# segment-routingRouter2(config-sr)# sr mapping-serverRouter2(config-sr-ms)# ldp-sid-mapRouter2(config-sr-ms-map)# address-family ipv4Router2(config-sr-ms-map-af)# 10.1.1.1/32 500 range 50

C. Router2(config)# segment-routingRouter2(config-sr)# mapping-serverRouter2(config-sr-ms)# prefix-sid-mapRouter2(config-sr-ms-map)# address-family ipv4Router2(config-sr-ms-map-af)# 10.1.1.1/32 500 range 50

D. Router2(config)# segment-routingRouter2(config-sr)# ldp mapping-serverRouter2(config-sr-ms)# prefix-sid-mapRouter2(config-sr-ms-map)# address-family ipv4Router2(config-sr-ms-map-af)# 2.2.2.2/32 500 range 40

 


Suggested Answer: C

 

Question 18

Refer to the exhibit.
 Image
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.

 


Suggested Answer: C

 

Question 19

What is the difference between RPL and route-maps?

A. Unlike RPL, route-maps are supported with IPv4 address families only.

B. Unlike route-maps, only RPL supports extcommunity sets to group extended communities.

C. Unlike route-maps, only RPL is designed for bulk configuration of multiple devices.

D. Unlike RPL, route-maps are designed for BGP protocol only.

 


Suggested Answer: C

 

Question 20

Refer to the exhibit.
 Image
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-Ð’. 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 10.1.1.0/24R2(config)# interface fastethernet 0/0R2(config-if)# ip router isis 100R2(config-if)# router isis 100 -R2(config-router)# distribute-list gateway List2 in

B. R2(config)# ip prefix-list List1 seq 3 deny 10.1.1.0/24R2(config)# ip prefix-list List1 seq 5 permit 30.1.1.0/24 ge 25 1eR2(config)# ip prefix-list List1 seq 10 permit 0.0.0.0/le 32R2(config)# interface fastethernet 0/0R2(config-if)# ip router isis 122R2(config-if)# router isis 122 -R2(config-router)# distribute-list prefix List1 in

C. R1(config)# ip prefix-list List2 seq 5 deny 10.1.1.0/24R1(config)# interface fastethernet 0/0R1(config-if)# ip router isis 100R1(config-if)# router isis 100 -R1(config-router)# distribute-list gateway List2 inR (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 0.0.0.127R2(config)# access-list 101 permit ip any 30.1.1.0 0.0.0.63R2(config)# access-list 101 deny ip any 0.0.0.0 0.0.0.0R2(config)# interface fastethernet 0/0R2(config-if)# ip router isis 121R2(config-if)# router isis 121 -R2(config-router)# distribute-list 101 in

 


Suggested Answer: C

 

Question 21

Image
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 reflection must be enabled

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

D. No client-to-client must be disabled

 


Suggested Answer: C

 

Question 22

Image
Refer to the exhibit. Router 1 is a core ABR in a Cisco Unified MPLS environment. All of the router 1 BGP peers are established, but traffic between customers is failing. Which BGP configuration must be added to the configuration?

A. It must be configured for graceful restart

B. It must be configured with a route reflector

C. It must be configured with send labels

D. It must be configured with PIC edge

 


Suggested Answer: C

 

Question 23

Image
Refer to the exhibit. What is the relationship between Router 1 and Router 2?

A. Router 1 centrally learns the topology of the network to aid in SR-TE path selection, and Router 2 is a node that feeds Router 1 topology information

B. Router 1 and Router 2 are participating in SR-TE tunnels and are both head-end routers

C. Router 1 and Router 2 centrally learn the topology of the network to aid in SR-TE path selection for peers

D. Router 2 is the head-end router in an SR-TE tunnel, and it is learning topology of the network from the PCE enabled on Router 1

 


Suggested Answer: D

 

Question 24

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

 


Suggested Answer: B

Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/seg_routing/configuration/xe-16-6/segrt-xe-16-6-book/sr-ospfv2-node-sid.html

Question 25

Image
Refer to the exhibit. Routers R2, R3, R4, and R5 all reside in the same area, with R1 in a different area. R3 is overutilized, and the engineer wants to reduce its CPU load. The engineer configured router R4 to summarize routes that it receives from R5, but R3 is still receiving all of the R5 routes. Which action resolves the issue?

A. Configure the summary routes on R5.

B. Configure R4 as a Level 1-Level 2 router.

C. Configure R2 as a Level 1 router.

D. Configure R3 in a new area.

 


Suggested Answer: D

 

Question 26

Refer to the exhibit.
 Image
R3 is:
•	failing to accept multicast RP information from Domain-A
•	advertising MSDP SA messages to R1 and R4
•	receiving SA messages only from R4
Which command must the engineer implement to resolve the issue?

A. R3# ip msdp sa-filter in 192.168.3.1

B. R3# no ip msap sa-filter in 192.168.1.1

C. R3# no ip msdp peer 192.168.1.1

D. R3# ip msdp sa-filter out 192.168.1.1

 


Suggested Answer: A

 

Question 27

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 IS-IS routing before implementing BFD.

B. Configure BFD between each adjacent router.

C. Configure BFD on any one of the routers.

D. Configure CEF before implementing BFD.

 


Suggested Answer: B

 

Question 28

Image
Refer to the exhibit. After you applied these configurations to routers R1 and R2, the two devices could not form a neighbor relationship. Which reason for the problem is the most likely?

A. The two routers cannot authenticate with one another.

B. The two routers have the same area ID.

C. The two routers have the same network ID.

D. The two routers have different IS-types.

 


Suggested Answer: C

 

Question 29

An engineer is implementing LFA FRR on PE routers to allow unicast traffic to rapidly converge around link or node failures. The engineer configured IS-IS on the newly deployed routers in the data center in the same exchange as other routers. Which additional action must the engineer take before configuring LFA on the PE routers?

A. Configure IP Cisco Express Forwarding on each router.

B. Configure the isis network point-to-multipoint command on each router.

C. Configure MPLS on each router.

D. Configure the isis network point-to-point command on each router.

 


Suggested Answer: D

 

Question 30

DRAG DROP
-
Drag and drop the characteristics from the left onto the corresponding routing protocols on the right.
 Image

 


Suggested Answer:
Correct Answer Image

 

Question 31

Image
Refer to the exhibit. OSPF is an interior routing protocol on the network. Routers R4 and R6 are in area 0, and all tunnels are in area 2. R4 is connected to R6 with a 1 Gbps link and with 100 Mbps links to the rest of the LAN. After the most recent maintenance window, a network engineer noticed that R4 is using a suboptimal route toward 10.173.12.10 instead of the route via R6. Which action must the network engineer take to correct reachability toward 10.173.12.10/24?

A. Configure auto-cost reference-bandwidth 1000 under the global OSPF configuration on R4.

B. Configure ip ospf cost 120 under the Gi0/0 interface on R4.

C. Configure ip ospf 2 area 0 under tunnel 3 on both R6 and R5.

D. Configure ip ospf 0 area 0 under tunnel 2 on both R4 and R5.

 


Suggested Answer: C

 

Question 32

Image
Refer to the exhibit. While troubleshooting a networking issue, an engineer identified a suboptimal communication issue on route reflector RR2. In the current environment:
•	Router A is a non-route-reflector client for RR1 and RR2.
•	Routers D and E are directly connected iBGP peers.
•	Router F is not an iBGP peer of routers D and E.
Which action resolves the issue?

A. Remove the route-reflector configuration on router RR2.

B. Disable BGP client-to-client reflection on router RR2.

C. Enable next-hop-self for BGP peering on router D.

D. Enable next-hop-self for BGP peering on router C.

 


Suggested Answer: D

 

Question 33

Refer to the exhibit.
 Image
Routers R1 and R2 reside in AS 65530, which is multihomed to the Internet. A network engineer expects devices in the AS to use R2 to access the Internet, but they are using R1 as the exit point from the AS. Which action corrects the problem?

A. Add a sequence number to the route map to remove the implicit deny.

B. Change the route map direction in the neighbor statement to out.

C. Configure the route map with a local preference of 200 or higher.

D. Remove the neighbor statements from the address family configuration and activate the neighbor globally on R1.

 


Suggested Answer: B

 

Question 34

Image
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.
Image

B.
Image

C.
Image

D.
Image

 


Suggested Answer: C

 

Question 35

Image
Refer to the exhibit. Which tree does multicast traffic follow?

A. shared tree

B. MDT default

C. source tree

D. MDT voice

 


Suggested Answer: B

 

Question 36

While configuring Cisco NSF awareness, a network engineer enters the bgp graceful-restart command after the BGP session is established in a router that runs IOS XE Software. Graceful restart capabilities are not exchanged. Which two actions should be taken? (Choose two.)

A. Reload the router

B. Verify that BGP route dampening is configured

C. Reduce BGP convergence time

D. Issue the clear ip bgp * command

E. Issue the show ip bgp neighbors command.

 


Suggested Answer: AD

 

Question 37

Image
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

 


Suggested Answer: A

 

Question 38

Image
Refer to the exhibit. Which router does R1 install as an alternate next hop when trying to reach R3 if LFA is enabled?

A. R5

B. R3

C. R4

D. R2

 


Suggested Answer: D

 

Question 39

Image
Refer to the exhibit. This network is deployed with all connected links configured to run IS-IS. The routing protocol is enabled globally on each router, and the network engineer expects full routing information to be shared among all routers. R5 is receiving routes from R4 but is missing routes from R1. Which action corrects the issue so that all routes are shared among the routers?

A. Configure R5 in the same area as R1.

B. Configure all routers to reside in the same area.

C. Configure R1 and R5 as Level 1/Level 2 routers.

D. Configure R3 as a Level 1 /Level 2 router.

 


Suggested Answer: B

 

Question 40

DRAG DROP -
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.)
Select and Place:
 Image

 


Suggested Answer:
Correct Answer Image

 

Question 41

Image
Refer to the exhibit. An engineer is troubleshooting an issue with this network and notices that prefixes from R3 are missing on the R1 rooting table. Due to repeated ASN, when the 10.0.0.0/8 prefix from R3 arrives at R1, BGP automatically rejects it. There is no prefix-list on R1 which blocks the traffic from R3. What should the engineer do to fix the problem so that BGP allows that prefix on R1?

A. Configure R2 as a route reflector client of R1.

B. Configure the next-hop-self command on R2.

C. Configure the allowas-in command on R1.

D. Configure identical confederation ASNs on R1 and R2.

 


Suggested Answer: C

 

Question 42

Image
Refer to the exhibit. CE1 and CE2 cannot communicate through the service provider BGP peering is established between PE1 and PE2. IS-IS is the only routing protocol running in the service provider core. What step can be done to troubleshoot the issue?

A. Switch the IGPs running in the core from IS-IS to OSPF to support a Cisco MPLS TE tunnel from PE1 to PE2.

B. Configure BGP between CE and PE routers.

C. Confirm that IS-IS is running with metric-style narrow.

D. Verify the MPLS LSPs.

 


Suggested Answer: C

 

Question 43

Image
Refer to the exhibit. A network engineer must correct the security policy on the EDGE_R router, which is connected to two Tier 1 ISPs. After another engineer added ip as-path access-list 11 permit 11 to EDGE_R, some routes from AS 11 and AS 4832 started to appear in the routing information base (RIB). Traffic control via Community options is disabled on both ISPs.
How should the network engineer update the router configuration on EDGE_R so that only routes for AS 11 are permitted?

A. Configure ip as-path distribution-list 11 deny *[0-9]+$.

B. Configure ip as-path access-list 11 deny_4832$.

C. Configure ip as-path access-list 11 permit_11_.

D. Configure ip as-path prefix-list 11 permit_11$.

 


Suggested Answer: B

 

Question 44

Which two conditions must be met before separate ISPs can provide interdomain multicast routing? (Choose two.)

A. Each ISP must configure MSDP to connect its individual multicast administrative domain to the domains at other ISPs.

B. Each ISP must dedicate a single router to handle multicast traffic between providers.

C. Each ISP must replace its RP assignment with a global RP.

D. Each ISP must configure its network to use PIM-DM.

E. Each ISP must support intradomain multicast routing.

 


Suggested Answer: AE

 

Question 45

Refer to the exhibit.
 Image
CE1 and CE2 are iBGP neighbors in AS 65516. All traffic that exits AS 65516 must use the link from CE1 to PE1. CE1 is advertising a higher local preference to CE2, but traffic from CE2 still prefers the PE2 link. Which action corrects the problem?

A. Add the lower local-preference value on PE2 towards CE2.

B. Configure CE1 to send routes to CE2 with a higher MED.

C. Configure CE1 to send routes to CE2 with a higher weight.

D. Add the next-hop self command to the CE1 neighbor statement for CE2.

 


Suggested Answer: A

 

Question 46

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

 


Suggested Answer: D

 

Question 47

What is one of the purposes of a default Multicast Distribution Tree?

A. to handle high-bandwidth source streams

B. to define the RP for PIM sparse mode and the different leafs

C. to offload traffic from data MDT

D. to support control traffic between different VRFs

 


Suggested Answer: C

 

Question 48

Image
Refer to the exhibit. An engineer at a large ISP is troubleshooting suboptimal routing on a customer’s IS-IS network with multiple Level 1-2 routers. The network consists of numerous routers that are configured for MPLS. When IS-IS picks the closest Level 1-2 router to exit the area, suboptimal routing occurs in Area 8 and Area 10. The other IGP protocols are running correctly, and the IS-IS adjacency between routers is established. Which action resolves the issue?

A. Redistribute Level 2 prefixes into Level 1 on router 2.

B. Disable advertisement of the default route on router 2.

C. Configure each interface as either Level 1 or Level 2 circuit type on router 1.

D. Configure the router as DIS for each of the interfaces on router 1.

 


Suggested Answer: C

 

Question 49

Which feature provides service independence in service provider networks?

A. node SID that identifies the network device

B. prefix SID that contains router hops toward the destination

C. adjacency SID that represents a path between the routers

D. binding SID that is used to stitch different domains

 


Suggested Answer: A

 

Question 50

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

 


Suggested Answer: B

 

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