Cisco 300-420 Exam Questions
Designing Cisco Enterprise Networks (ENSLD) (Page 12 )

Updated On: 5-Mar-2026



Refer to the exhibit. Which method must an architect use to provide connectivity between the mail servers?

  1. ISATAP
  2. 6to4
  3. 6rd
  4. IPv4 compatible

Answer(s): B



A network engineer must optimize a campus OSPF deployment. Currently, each time a type 1 or type 2 LSA is generated within an area, the OSPF process must recompute the entire SPT. Which solution improves the recomputation process?

  1. SPF
  2. PRC
  3. BFD
  4. iSPF

Answer(s): D



An engineer is designing a BGP solution supporting a VXLAN environment over a Layer 3 IPv4 network fabric with these requirements:
-provide Layer 2 adjacency
-allow VM migration of workloads between sites
-IGP is OSPF

Which BGP address family must the engineer choose?

  1. L2VPN VPLS-VPWS
  2. L2VPN EVPN
  3. IPv4 unicast
  4. VPNv4

Answer(s): B



Which protocol is deployed through LAN automation to build node-to-node underlay adjacencies in SDA?

  1. IS-IS
  2. LISP
  3. OSPF
  4. VXLAN

Answer(s): A





Refer to the exhibit. A customer requires maximum uptime for the data plane between R1 and R3 running OSPF.
Which solution must the design include for high availability if the routing process on R2 requires maintenance?

  1. nonstop forwarding on R3 only
  2. graceful restart on all routers
  3. nonstop forwarding on R1 and R3
  4. BFD on all routers

Answer(s): B



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