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  1. Home
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  3. 300-420

Cisco® 300-420 Exam (page: 5)
Cisco® Designing Enterprise Networks (ENSLD)
Updated on: 02-Jan-2026

Viewing Page 5 of 59
300-420 PDF 386 Questions

Refer to the exhibit.


An architect must design an IP addressing scheme for a multisite network connected via a WAN transit. The campus site must accommodate 12,000 devices and the branch sites must accommodate 1,000 devices. Which address scheme optimizes network device resources, contains convergence events to the different blocks of the network, and ensures future growth of the network?


  1. • Campus: 10.0.0.0/18
    • Branch1: 10.0.192.0/21
    • Branch2: 10.0.200.0/21

  2. • Campus: 10.0.0.0/16
    • Branch1: 10.255.0.0/20
    • Branch2: 10.255.16.0/20

  3. • Campus: 10.0.0.0/10
    • Branch1: 10.64.0.0/10
    • Branch2: 10.128.0.0/10

  4. • Campus: 10.0.0.0/20
    • Branch1: 10.0.64.0/21
    • Branch2: 10.0.128.0/21

Answer(s): A



Refer to the exhibit.


Area 10 is a regular OSPF area and networks 10.1.1.0/24 and 172.16.1.0/24 are internal.
Which design provides optimal routing between both networks when the link between routers C and E fails?

  1. Move the link between routers C and D to area 10.
  2. Create an OSPF virtual link between routers E and F.
  3. Create a tunnel between routers E and F in area 10.
  4. Make area 10 a not-so-stubby area.

Answer(s): A



Refer to the exhibit.


An engineer is designing an OSPF network for a client. Requirements dictate that the routers in Area 1 should receive all routes belonging to the network, including EIGRP, except the ones originated in the RIP domain. Which action should the engineer take?

  1. Make area 1 a NSS
  2. Make area 1 a stub.
  3. Make area 1 a standard OSPF area.
  4. Make the area 1 routers part of area 0.

Answer(s): A



An engineer is tasked with designing a dual BGP peering solution with a service provider. The design must meet these conditions:

•The routers will not learn any prefix with a subnet mask greater than /24.
•The routers will determine the routes to include in the routing table based on the length of the mask alone.
•The routers will make this selection regardless of the service provider configuration.

Which solution should the engineer include in the design?

  1. Use a route map and access list to block the desired networks, and apply the route map to BGP neighbors inbound.
  2. Use a route map and prefix list to block the desired networks, and apply the route map to BGP neighbors outbound.
  3. Use an IP prefix list to block the desired networks and apply the IP prefix list to BGP neighbors outbound.
  4. Use an IP prefix list to block the desired networks and apply the IP prefix list to BGP neighbors inbound.

Answer(s): D



An engineer is designing an EIGRP network for a small branch office site where there is only one Layer 3 router. The engineer wants the router to advertise the local LAN network to remote EIGRP neighbors without sending any unnecessary multicast messages on the local LAN. Which action should the engineer take?

  1. Use a static default route for this site instead of EIGRP
  2. Advertise the local LAN using the network command and the passive-interface feature
  3. Redistribute the local LAN network using the redistribute connected command
  4. Advertise the local LAN subnet as a stub network

Answer(s): B



Viewing Page 5 of 59



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