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Home Cisco® 300-420

Cisco® 300-420 Exam Practice Questions (P. 4)

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Question #31

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?
  1. A
    no-advertise
  2. B
    next-hop
  3. C
    no-export
  4. D
    maximum-prefix

Correct Answer:
C

Question #32

Refer to the exhibit. An architect must create a stable and scalable EIGRP solution for a customer. The design must:
✑ conserve bandwidth, memory, and CPU processing
✑ prevent suboptimal routing
avoid any unnecessary queries

Which two solutions must the architect select? (Choose two.)
  1. A
    route summarization
  2. B
    prefix lists
  3. C
    distribute lists
  4. D
    stub routing
  5. E
    static redistribution

Correct Answer:
AC

Question #33

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?
  1. A
    Use update-source to specify the Loopback interface.
  2. B
    Use next-hop-self attributes only for routes that are learned from eBGP peers.
  3. C
    Configure the eBGP TTL to support eBGP multihop.
  4. D
    Use maximum-paths to install multiple paths in the routing table.

Correct Answer:
D

Question #34
A customer's environment includes hosts that support IPv6-only. Several of these hosts must communicate with a public web server that has only IPv4 domain name resolution. Which solution should the customer use in this environment?
  1. A
    utilize NAT64 to translate the addresses
  2. B
    implement NAT44 at the edge of the customer network
  3. C
    use 6to4 and a tunnel to translate the addresses
  4. D
    implement 6PE to resolve hostname resolution

Correct Answer:
A

Question #35
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.)
  1. A
    2a01:0c30:0016:7009::3a00/120
  2. B
    2a01:0c30:0016:7009::3b00/121
  3. C
    2a01:0c30:0016:7009::3a80/121
  4. D
    2a01:0c30:0016:7009::3c00/120
  5. E
    2a01:0c30:0016:7009::3b00/120

Correct Answer:
AE

Question #36
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?
  1. A
    Enable IS-IS remote LFA FRR on both devices.
  2. B
    Enable NSR on the switch.
  3. C
    Enable NSF on the switch.
  4. D
    Configure ISIS aggressive timers on both devices.

Correct Answer:
C

Question #37
Refer to the exhibit.

An architect must design an IGP solution for an enterprise customer. The design must support:
✑ Physical link flaps should have minimal impact.
✑ Access routers should converge quickly after a link failure.
Which two ISIS solutions should the architect include in the design? (Choose two.)
  1. A
    Use BGP to IS-IS redistribution to advertise all Internet routes in the Level 1 area.
  2. B
    Advertise the IS-IS interface and loopback IP address toward the Internet and data center.
  3. C
    Reduce SPF and PRC intervals to improve convergence time.
  4. D
    Configure all access and aggregate routers to establish Level 1 / Level 2 adjacencies across the network.
  5. E
    Configure access routers to establish a Level 1 adjacency and aggregate routers to establish a Level 1 / Level 2 adjacency.

Correct Answer:
CD

Question #38
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?
  1. A
    Add aggregation layer between core and access networks.
  2. B
    Enable graceful restart on routers A and C.
  3. C
    Enable FRR for the connected networks of routers A and C.
  4. D
    Enable summarization on routers A and C.

Correct Answer:
C

Question #39
Refer to the exhibit.

A network engineer is designing a network for AS100. The design should ensure that all traffic enters AS100 via link 1 unless there is a network failure. In the event of a failure, link 2 should function as the path for incoming traffic. Which solution should the design include?
  1. A
    Modify the next-hop attribute on R3.
  2. B
    Use AS-Path prepending on R3.
  3. C
    Modify the next-hop attribute on R4.
  4. D
    Use AS-Path prepending on R4.

Correct Answer:
D

Question #40
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?
  1. A
    Configure the OSPF cost of the link to a value lower than 30.
  2. B
    Lower the Administrative Distance for OSPF area 0.
  3. C
    Place the link into area 2 and install a new link between R1 and R2 in area 0.
  4. D
    Configure the link to provide multiarea adjacency.

Correct Answer:
A

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