Cisco CCNP Enterprise 300-420 Questions & Answers

• Question 141:

  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?

  

  A. Campus: 10.0.0.0/18 Branch1: 10.0.192.0/21 Branch2: 10.0.200.0/21

  B. Campus: 10.0.0.0/16 Branchi: 10.255.0.0/20 Branch2: 10.255.16.0/20

  C. Campus: 10.0.0.0/10

  Branch1: 10.64.0.0/10

  Branch2: 10.128.0.0/10

  D. Campus: 10.0.0.0/20 Branch1: 10.0.64.0/21 Branch2: 10.0.128.0/21

  Correct Answer: A

• Question 142:

  An architect is working on a design to connect a company's main site to several small to medium- sized remote branches. The solution must include redundant WAN links, but the customer has a limited budget and wants the ability to increase the link speed easily in the future. QoS will not on the branch routers so there is no need for consistent end-to-end QoS. Which solution does the architect propose?

  A. dual-homed WAN MPLS with single edge router

  B. dual-homed Internet with a single edge router running a site-to-site VPN topology

  C. dual-homed WAN MPLS and Internet links via dual edge routers

  D. dual-homed Internet with dual edge routers running a hub-and-spoke VPN topology

  Correct Answer: B

• Question 143:

  Refer to the exhibit. An engineer is designing a BGP solution for a client that peers with ISP1 for full Internet connectivity and with ISP2 for direct exchange of routes for several third parties. Which action, when implemented on the edge routers, enables the client network to reach the Internet through ISP1?

  

  A. Run an eBGP session within different VRFs for each ISP.

  B. Advertise a default route for downstream routers within the client network.

  C. Apply the AS-path prepend feature for ISP2.

  D. Apply route filtering such that the client advertises only routes originated from its own AS.

  Correct Answer: B

• Question 144:

  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

  Correct Answer: A

• Question 145:

  An existing network solution is using BFD in echo mode. Several of the network devices are experiencing high CPU utilization which an engineer has determined is related to the BFD feature. Which solution should the engineer leverage to reduce the CPU load?

  A. Implement slow timers between peers with low CPU resources.

  B. Implement BED asynchronous mode between peers with low CPU resources.

  C. Enable BFD multi-hop on the devices with low CPU resources.

  D. Utilize carrier delay on all routers in the network.

  Correct Answer: A

• Question 146:

  An engineer must design a solution to provide backup connectivity between two sites. The engineer plans to use an Internet connection but company policy requires the connection to be encrypted.

  Additionally, there are several applications that utilize multicast to deliver video streams between the sites. Which technology should the design include?

  A. GRE over IPsec

  B. IPsec direct encapsulation

  C. GETVPN

  D. DMVPN

  Correct Answer: A

• Question 147:

  An architect is designing a multicast solution for a network that contains over 100 routers. The architect plans to create several multicast domains and balance the PIM-SM traffic within the network. Which technology should the architect include in the design?

  A. DVMRP

  B. IGMP

  C. MOSPF

  D. MSDP

  Correct Answer: D

• Question 148:

  An architect is designing a network that will utilize the spanning tree protocol to ensure a loop-free topology. The network will support an engineering environment where it is necessary for end users to connect their own network switches for testing purposes. Which feature should the architect include in the design to ensure the spanning tree topology is not affected by these rogue switches?

  A. BPDU Skew Detection

  B. BPDU guard

  C. loop guard

  D. root guard

  Correct Answer: D

• Question 149:

  A client is moving to Model-Driven Telemetry and requires periodic updates. What must the network architect consider with this design?

  A. Updates that contain changes within the data are sent only when changes occur.

  B. Empty data subscriptions do not generate empty update notifications.

  C. Periodic updates include a full copy of the data that is subscribed to.

  D. The primary push update is sent immediately and cannot be delayed.

  Correct Answer: C

  Periodic updates contain a full copy of the subscribed data element or table for all supported transport protocols

  https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/166/b_166_programmability_cg/model_driven_telemetry.html

• Question 150:

  What is the function of the multicast Reverse Path Forwarding check?

  A. It allows for a loop-free distribution tree from the source to receivers.

  B. It serves as an Auto RP Mapping agent.

  C. It prevents bootstrap messages from reaching all routers.

  D. It is used to discover and announce RP-set information.

  Correct Answer: A