Free 300-420 Practice Questions and Answers | Updated 2025

• Question 1

  At which layer does Cisco Express Forwarding use adjacency tables to populate addressing information?

  • Layer4
  • Layer 2
  • Layer 1
  • Layer 3

  Show Answer Answer: B Next

• Question 2

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

  • It allows for a loop-free distribution tree from the source to receivers.
  • It serves as an Auto RP Mapping agent.
  • It prevents bootstrap messages from reaching all routers.
  • It is used to discover and announce RP-set information.

  Show Answer Answer: A Next

• Question 3

  An engineer is looking for a standards-driven YANG model to manage a multivendor network environment. Which model must the engineer choose?

  • Native
  • OpenConfig
  • IETF
  • IEEE NETCONF

  Show Answer Answer: C Next

• Question 4

  An engineer is working with NETCONF and Cisco NX-OS based devices. The engineer needs a YANG model that supports a specific feature relevant only to Cisco NX-OS. Which model must the engineer choose?

  • Native
  • IEEE
  • OpenConfig
  • IETF

  Show Answer Answer: A Next

• Question 5

  A company is running BGP on a single router, which has two connections to the same ISP. Which BGPfeature ensures traffic is load balanced across the two links to the ISP?

  • Multihop
  • Multipath Load Sharing
  • Next-Hop Address Tracking
  • AS-Path Prepending

  Show Answer Answer: B Next