Cisco CCNP Enterprise 300-420 Questions & Answers

• Question 131:

  A network engineer is redesigning a company's QoS solution. The company is currently using IP Precedence, but the engineer plans to move to DiffServ. It is important that the new solution provide backward compatibility with the current solution. Which technology should the design include?

  A. expedited forwarding

  B. assured forwarding

  C. class selector code points

  D. default per hop behavior

  Correct Answer: C

• Question 132:

  An engineer must propose a solution for a campus network that includes the capability to create multiple Layer 3 virtual networks. Each network must have its own addressing structure and routing table for data forwarding. The solution must be scalable to support hundreds of virtual networks and allow simple configuration and management with minimal administrative overhead. Which solution does the engineer recommend?

  A. hop-by-hop EVN

  B. multihop MPLS core

  C. multihop IPsec tunneling

  D. hop-by-hop VRF-Lite

  Correct Answer: D

  https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Campus/Network_Virtualization/sccsolover.html

• Question 133:

  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.

  Correct Answer: D

• Question 134:

  Refer to the exhibit. Which two solutions maximize the use of the links between the core and distribution layers? (Choose two.)

  

  A. use multiple equal-cost links

  B. use an IGP

  C. use HSRP

  D. use RPVSTP+

  E. use multiple unequal-cost links

  Correct Answer: AB

• Question 135:

  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.

  Correct Answer: A

• Question 136:

  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?

  

  A. Move the link between routers C and D to area 10.

  B. Create an OSPF virtual link between routers E and F.

  C. Create a tunnel between routers E and F in area 10.

  D. Make area 10 a not-so-stubby area.

  Correct Answer: A

• Question 137:

  An architect is creating a migration strategy for a large organization in which the choice made by the application between IPv6 and IPv4 is based on the DNS request. Which migration strategy does the architect choose?

  A. AFT for public web presence

  B. host-initiated tunnels

  C. dual stack

  D. site-to-site IPv6 over IPv4 tunnels

  Correct Answer: C

• Question 138:

  An engineer must design a scalable QoS architecture that allows the separation of the traffic into classes on predefined business requirements. The design must also utilize the differentiated services code points as the QoS priority descriptor value and support at least 10 levels of classification. Which QoS technology should the engineer include in the design?

  A. RSVP

  B. Diffserv

  C. Best effort

  D. Interserv

  Correct Answer: B

• Question 139:

  Refer to the exhibit. Customers report low video quality and delays when having point-to-point telepresence video calls between the two locations. An architect must optimize a design so that traffic follows the same path for egress and ingress traffic flows. Which technique optimizes the design?

  

  A. Configure route leaking on the router in area 2.

  B. Configure route leaking on the router in area 1.

  C. Configure the high metric on the router in area 4.

  D. Configure route filter on the router in area 4.

  Correct Answer: A

  IS-IS Level1 Router allways take the route towards the closest L2 Router, when trying to reach a destination outside the AS. That is the reason why the return-traffic takes a different way here.

  The problem occurs because Level1 and Level2 topologies are examied separatly by the respective routers. The solution is to hand down Level2 routing-information about the destination networks into Layer1 routing, so it can be included into

  path selection.

• Question 140:

  An engineer must design a solution to connect a customer to the Internet. The solution will include a Layer 3 circuit with a CIR of 50 Mbps from the service provider. The hand-off from the provider's switch to the customer's router is 1Gbps. Which solution should the engineer include to prevent potential issues with choppy voice traffic?

  A. Reduce the bandwidth of the connection to the router.

  B. Implement hierarchical QoS with a parent policing policy.

  C. Implement hierarchical QoS with a parent shaping policy.

  D. Add a bandwidth statement to the router interface.

  Correct Answer: B