300-410 practice questions 521–530

1. Question 521 · 578 in bank

   

   Refer to the exhibit. An engineer must troubleshoot an issue affecting the communication from router R2 to the TACACS server. Which configuration resolves the issue?

   • AR1 (config)#tacacs-server packet maxsize 43974
   • BR2(config)#tacacs server advrt - R2 (config-server-tacacs)#key xyz123
   • CR2(config)#tacacs-server packet maxsize 43974
   • DR1 (config)#tacacs server advrt - R1 (config-server-tacacs)#kty xyz123

   Show answer

   Answer: B

   Explanation

   The question asks about the problem between R2 and the Tacas server, so there is no mention of R1, hence we do not care about R1.

   Source: Adapted from community discussion — Thomas12345678

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2. Question 522 · 578 in bank

   Refer to the exhibit. An engineer configures a static route on a router, but when the engineer checks the route to the destination, a different next hop is chosen. What is the reason for this?

   

   • ADynamic routing protocols always have priority over static routes.
   • BThe metric of the OSPF route is lower than the metric of the static route.
   • CThe configured AD for the static route is higher than the AD of OSPF.
   • DThe syntax of the static route is not valid, so the route is not considered.

   Show answer

   Answer: C

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3. Question 523 · 578 in bank

   Which mechanism must be chosen to optimize the reconvergence time for OSPF at company location 408817202 that is less CPU-intensive than reducing the hello and dead timers?

   • Asso
   • BBFD
   • CDead Peer Detection keepalives
   • DOSPF demand circuit

   Show answer

   Answer: B

   Explanation

   Reference: https://forum.networklessons.com/t/ospf-hello-and-dead-interval/1255

   Source: Adapted from community discussion — bk989

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4. Question 524 · 578 in bank

   

   Refer to the exhibit. An engineer configured SNMP in R1 to be able to save and upload configurations to the SNMP server but failed when they tried to backup R1 configuration on the server. Which configuration resolves the issue?

   • Asnmp server tftp-server-list 66
   • Bcopy running-config tftp://10.66.66.66/r1-confg
   • Csnmp server tftp-server-list 20
   • Dcopy running-config tftp://10.66.66.66/c: r1-confg

   Show answer

   Answer: A

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5. Question 525 · 578 in bank

   Select 2

   What are two features of BFD? (Choose two.)

   • Areliable
   • Breplaces hello messages
   • Crequires routing protocols
   • Dscalable
   • Eintensive on CPU for Layer 2 links

   Show answer

   Answer: BD

   Explanation

   im going with B & D Replaces hello messages: BFD provides a rapid failure detection mechanism that can be used instead of or in conjunction with traditional hello messages used in routing protocols. Scalable: BFD is designed to be scalable, allowing it to efficiently detect failures in large networks with minimal overhead. A is incorrect since reliability is not typically a defining feature of BFD, as BFD's primary goal is fast failure detection rather than ensuring reliability in the conventional sense.

   Source: Adapted from community discussion — [Removed]

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6. Question 526 · 578 in bank

   What is the role of LDP in MPLS networks?

   • AIt creates MPLS packet forwarding along with the IGP routes.
   • BIt enables label binding information to exchange with peer LSRs.
   • CIt disables label binding information to exchange with peer LSRs.
   • DIt enables label binding that exchanges route descriptors.

   Show answer

   Answer: B

   Explanation

   if A said it creates MPLS packet forwarding based on IGP routes (shortest distance), it would make some sense. C: No it doesn't disable it D: It doesn't exchange route descriptors. it exchanges labels based on destination prefixes.

   Source: Adapted from community discussion — bk989

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7. Question 527 · 578 in bank

   Which Layer 3 VPN attribute allows different customers to connect to the same MPLS network with overlapping IP ranges?

   • ART
   • BRD
   • CVRF
   • DMP-BGP

   Show answer

   Answer: B

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8. Question 528 · 578 in bank

   

   Refer to the exhibit. An engineer configured IP SLA to monitor a next hop on a router for reachability. When the next hop is unreachable, the router is executing tracking and falling over another route, but packet loss is experienced because the reachability is flapping. Which action resolves the issue?

   • AIncrease the frequency of the sla probe to 60.
   • BAppend delay up 60 down 60 to the track command.
   • CAppend delay up 0 down 0vto the track command.
   • DIncrease the timeout of the sla probe to 6000.

   Show answer

   Answer: B

   References

   • Cisco documentation

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9. Question 529 · 578 in bank

   What is the use of IPv6 snooping?

   • Acaptures IPv6 routing protocol packets to analyze
   • Brequires an external IPv6 packet analyzer
   • Crequired for the operation of IPv6 RA Guard
   • Dcaptures any type of user traffic to create a binding table

   Show answer

   Answer: D

   Explanation

   D: correct IPv6 Snooping IPv6 snooping captures the IPv6 traffic and helps in populating the binding table. It gathers addresses in control messages such as Neighbor Discovery Protocol (NDP) or Dynamic Host Configuration Protocol (DHCP) packets. Depending on the security level, it blocks unwanted messages such as Router Advertisements (RA) or DHCP replies. This feature is a pre-requisite to the remaining security features mentioned here. https://www.cisco.com/c/en/us/td/docs/routers/7600/ios/15S/configuration/guide/7600_15_0s_book/IPv6_Security.html

   Source: Adapted from community discussion — TonyTe0

   References

   • Cisco documentation

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10. Question 530 · 578 in bank

    

    Refer to the exhibit. An engineer must troubleshoot a connectivity issue impacting the redistribution of the subnet 172.16.2.48/28 into the OSPF domain. Which configuration on router R1 advertises this subnet into the OSPF domain?

    

    • AR1(config)#route-map CCNP permit 10 R1(config-route-map)#match tag 200 R1(conflg-route-map)#exit - R1(config)#router ospf 10 - R1(config-router)#redistribute eigrp 100 subnets route-map CCNP
    • BR1(config)#route-map CCNP deny 10 R1(conflg-route-map)#match tag 200 R1(config)#route-map CCNP permit 10 R1(config)#router ospf 10 - R1(conflg-router)#redistrlbute eigrp 100 subnets route-map CCNP
    • CR1(config)#route-map CCNP permit 10 R1(config-route-map)#match route-type internal R1(config)#router ospf 10 - R1(config-router)#redistribute eigrp 100 subnets route-map CCNP
    • DR1(config)#route-map CCNP permit 10 R1(config-route-map)#match route-type level-2 R1(config)#router ospf 10 - R1(config-router)#redistribute eigrp 100 subnets route-map CCNP

    Show answer

    Answer: A

    Explanation

    Answer is A An engineer must troubleshoot a connectivity issue impacting the redistribution of the subnet 172.16.2.48/28 Look exhibit R4 has NO routes because EIGRP is NOT being redistributed. We want to redistribute 172.16.2.48 Look at the R4 static route with a tag of 200. A = Correct B would be correct if 172.16.2.48 was an external route on R2 as well as R4. This way it has no tag and gets redistributed. C is for redistributing from ospf not from EIGRP D is for redistributing from IS-IS not EIGRP

    Source: Adapted from community discussion — bk989

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300-410 practice, question 521. 578 questions available.