Cisco 300-420 Online Practice Questions and Exam Preparation

Cisco 300-420 Online Questions & Answers

• Question 331:

  Refer to the exhibits.

  

  An engineer is troubleshooting an issue in which the Gig0/2 interface on a Cisco switch named SW2 fails to become the root port. Which two commands must be run on SW2 to resolve this issue? (Choose two.)

  A. SW2(config-if)# no spanning-tree cost 4
  B. SW2(config)# interface Gig0/2
  C. SW2(config-if)# spanning-tree cost 4
  D. SW2(config)# interface Fa0/3
  E. SW2(config-if)# spanning-tree cost 5
  A. SW2(config-if)# no spanning-tree cost 4
  D. SW2(config)# interface Fa0/3

• Question 332:

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

  1.The routers will not learn any prefix with a subnet mask greater than /24.

  2.The routers will determine the routes to include in the routing table based on the length of the mask alone.

  3.The routers will make this selection regardless of the service provider configuration. Which solution should the engineer include in the design?

  A. Use a route map and access list to block the desired networks, and apply the route map to BGP neighbors inbound.
  B. Use a route map and prefix list to block the desired networks, and apply the route map to BGP neighbors outbound.
  C. Use an IP prefix list to block the desired networks and apply the IP prefix list to BGP neighbors outbound.
  D. Use an IP prefix list to block the desired networks and apply the IP prefix list to BGP neighbors inbound.
  D. Use an IP prefix list to block the desired networks and apply the IP prefix list to BGP neighbors inbound.

• Question 333:

  An engineer is designing a Layer 3 campus network running EIGRP between the core, aggregation, and access layers. The access layer switches will be connected to the aggregation layer using Layer 3 copper connections. The engineer wants to improve convergence time for access layer switch failures. Which technique must the design include?

  A. enabling BFD for EIGRP on the access layer uplinks
  B. reducing the EIGRP Hello / Hold timer values
  C. EIGRP summarization from core to aggregation layer
  D. EIGRP summarization from access to aggregation layer
  A. enabling BFD for EIGRP on the access layer uplinks

• Question 334:

  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?

  

  A. Make area 1 a NSSA.
  B. Make area 1 a stub.
  C. Make area 1 a standard OSPF area.
  D. Make the area 1 routers part of area 0.
  A. Make area 1 a NSSA.

• Question 335:

  An architect must develop a campus network solution that includes:

  1.logically segmented and isolated networks

  2.ability to communicate between network segments when required

  3.support for overlapping IP addresses

  4.widely available technologies to avoid purchasing specialized equipment Which solution must the architect select?

  A. VSS with IGP
  B. 802.1Q with HSRP
  C. vPC with HSRP
  D. VRF-Lite with OSPF
  D. VRF-Lite with OSPF

• Question 336:

  Refer to the exhibit.

  

  An engineer is planning an IPv4 to IPv6 migration solution for a customer. The routers in the network can support IPv4 and IPv6, except for the DWDM routers. The DWDM routers provide a Layer 2 link in which the routers peer directly with each other across a DWDM circuit. The circuit also provides connectivity between the mail servers.

  Which IPv6 migration technique must the engineer deploy?

  A. dual-stack
  B. 6to4
  C. ISATAP
  D. 6rd
  C. ISATAP

• Question 337:

  Which feature is used to optimize WAN bandwidth of IGMP network traffic among WAN Edge routers in the same VPN?

  A. IGMPv2
  B. multicast RP
  C. multicast-replicator
  D. multicast service routes
  C. multicast-replicator

• Question 338:

  Which design element should an engineer consider when multicast is included in a Cisco SD-Access architecture?

  A. PIM SSM must run in the underlay.
  B. Multicast clients reside in the underlay, and the multicast source is outside the fabric or in the overlay.
  C. Rendezvous points must be used in a PIM SSM deployment.
  D. Multicast traffic is transported in the overlay and the EID space for wired and wireless clients.
  D. Multicast traffic is transported in the overlay and the EID space for wired and wireless clients.

• Question 339:

  Refer to the exhibit.

  

  An engineer must optimize the traffic flow of the network. Which change provides a more efficient design between the access and the distribution layer?

  A. Add a link between access switch A and access switch B
  B. Reconfigure the distribution switch A to become the HSRP Active
  C. Change the link between distribution switch A and distribution switch B to be a routed link
  D. Create an EtherChannel link between distribution switch A and distribution switch B
  B. Reconfigure the distribution switch A to become the HSRP Active

• Question 340:

  When a first hop redundancy solution is designed, which protocol ensures that load balancing occurs over multiple routers using a single virtual IP address and multiple virtual MAC addresses?

  A. GLBP
  B. IRDP
  C. VRRP
  D. HSRP
  A. GLBP