Cisco CCNP Enterprise 300-420 Questions & Answers

• Question 101:

  Refer to the exhibit.

  

  An architect must design a solution that uses the direct link between R1 and R2 for traffic from 10.10.10.0/24 toward network 10.10.20.0/24. Which solution should the architect include in the design?

  A. Configure the OSPF cost of the link to a value lower than 30.

  B. Lower the Administrative Distance for OSPF area 0.

  C. Place the link into area 2 and install a new link between R1 and R2 in area 0.

  D. Configure the link to provide multiarea adjacency.

  Correct Answer: D

• Question 102:

  Refer to the exhibit.

  

  An architect must design an IGP solution for an enterprise customer. The design must support:

  1.

  Physical link flaps should have minimal impact.

  2.

  Access routers should converge quickly after a link failure.

  Which two ISIS solutions should the architect include in the design? (Choose two.)

  A. Use BGP to IS-IS redistribution to advertise all Internet routes in the Level 1 area.

  B. Advertise the IS-IS interface and loopback IP address toward the Internet and data center.

  C. Reduce SPF and PRC intervals to improve convergence time.

  D. Configure all access and aggregate routers to establish Level 1 / Level 2 adjacencies across the network.

  E. Configure access routers to establish a Level 1 adjacency and aggregate routers to establish a Level 1 / Level 2 adjacency.

  Correct Answer: CE

  Answer C should be responsible for timer optimalization

  Answer E should be the proper design in an "IS-IS Hybrid topology design"

  (L1/L2 routers maintain a separate lin-state database for L1 routes and L2 routes > This increases their CPU > So Access routes should never be

  both L1/L2 devices, only pure L1 devices)

  (Source ENSLD 300-420 official cert book page: 119)

• Question 103:

  Refer to the exhibit.

  

  An engineer is designing a routing solution for a customer. The design must ensure that a failure of network 10.1.0.0/24, 10.1.2.0/24, 10.2.1.0/24, or 10.2.3.0/24 does not impact the core. It also requires fast convergence time during any link failover in the core or access networks.

  Which solution must the engineer select?

  A. Add aggregation layer between core and access networks.

  B. Enable graceful restart on routers A and C.

  C. Enable FRR for the connected networks of routers A and C.

  D. Enable summarization on routers A and C.

  Correct Answer: C

• Question 104:

  Refer to the exhibit.

  

  A network engineer must improve the current IS-IS environment. The Catalyst switch is equipped with dual supervisors. Each time a stateful switchover occurs, the network experiences unnecessary route recomputation. Which solution addresses this issue if the upstream router does not understand graceful restart messaging?

  A. Enable IS-IS remote LFA FRR on both devices.

  B. Enable NSR on the switch.

  C. Enable NSF on the switch.

  D. Configure ISIS aggressive timers on both devices.

  Correct Answer: B

• Question 105:

  A company is planning to open two new branches and allocate the 2a01:c30:16:7009::3800/118 IPv6 network for the region. Each branch should have the capacity to accommodate a maximum of 200 hosts. Which two networks should the company use? (Choose two.)

  A. 2a01:0c30:0016:7009::3a00/120

  B. 2a01:0c30:0016:7009::3b00/121

  C. 2a01:0c30:0016:7009::3a80/121

  D. 2a01:0c30:0016:7009::3c00/120

  E. 2a01:0c30:0016:7009::3b00/120

  Correct Answer: AE

• Question 106:

  Refer to the exhibit. An architect must design a solution to connect the two ASs. To optimize bandwidth, the design will implement load sharing between router R6 and router R1. Which solution should the design include?

  

  A. Use update-source to specify the Loopback interface.

  B. Use next-hop-self attributes only for routes that are learned from eBGP peers.

  C. Configure the eBGP TTL to support eBGP multihop.

  D. Use maximum-paths to install multiple paths in the routing table.

  Correct Answer: D

• Question 107:

  Refer to the exhibit. AS65533 and AS65530 are announcing a partial Internet routing table as well as their IP subnets. An architect must create a design that ensures AS64512 does not become a transit AS. Which filtering solution must the architect choose?

  

  A. no-advertise

  B. next-hop

  C. no-export

  D. maximum-prefix

  Correct Answer: C

• Question 108:

  Refer to the exhibit. An architect must create a stable and scalable EIGRP solution for a customer. The design must:

  1.

  conserve bandwidth, memory, and CPU processing

  2.

  prevent suboptimal routing

  3.

  avoid any unnecessary queries

  Which two solutions must the architect select? (Choose two.)

  

  A. route summarization

  B. prefix lists

  C. distribute lists

  D. stub routing

  E. static redistribution

  Correct Answer: AD

• Question 109:

  An engineer must connect a new remote site to an existing OSPF network. The new site consists of two low-end routers, one for WAN, and one for LAN. There is no demand for traffic to pass through this area. Which area type does the engineer choose to provide minimal router resource utilization, while still allowing for full connectivity to the rest of the network?

  A. not so stubby

  B. totally not so stubby

  C. totally stubby area

  D. stubby area

  Correct Answer: C

• Question 110:

  An engineer is creating a design to enable IPv6 to run on an existing IPv4 IS-IS network. The IPv4 and IPv6 topologies will match exactly, and the engineer plans to use the same IS-IS router levels for each protocol per interface. Which IS-IS design is required?

  A. multi topology without enabling transition feature

  B. multi topology with transition feature enabled

  C. single topology without enabling transition feature

  D. single topology with transition feature enabled

  Correct Answer: C

  C. single topology without enabling transition feature

  In a single topology design, both IPv4 and IPv6 addresses can be carried within the same IS-IS domain without creating separate topologies. IS-IS,

  being a Layer 2 protocol, can natively support both IPv4 and IPv6. By utilizing a single topology design without any transition feature, the engineer

  can enable IPv6 on the existing IPv4 IS-IS network with the same router levels for each protocol per interface, while still maintaining a single,

  integrated topology.