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  1. Home
  2. Cisco Certification
  3. 300-420 Exam
  4. Cisco.300-420.v2025-11-03.q115 Dumps
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Question 21

A network architect is enabling TV services in the LAN. The source will be streaming to the
239.1.1.1 group IP address. Dense mode is not allowed in the network. Multicast has already been enabled on all network devices in the LAN segment. Which action must the architect take to finalize the design?

Correct Answer: D
insert code

Question 22

Refer to the exhibit. The failover time of ISP-2 is significantly shorter than ISP-1 when an interface on the ISP router toward the campus network fails. Which solution minimizes the downtime to the sub-second?

Correct Answer: D
BFD provides sub-second failure detection (https://howdoesinternetwork.com/2018/bfd), and next-hop tracking is enabled in IOS by default.
(https://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/sbbnhop.html)
insert code

Question 23

Refer to the exhibit. An architect must design an OSPF solution for an enterprise customer. The design must meet these requirements:
- Limit the link flap impact to Area-1 and Area-2.
- Any link failure must have minimal impact on voice and video traffic
Which two OSPF solutions must the architect include in the design? (Choose two.)

Correct Answer: D,E
insert code

Question 24

Exhibit:

Refer to the exhibit. An engineer is designing a Layer 2 campus network. The design must support fast convergence and leverage as much bandwidth as possible between layers. Distribution switches do support VSS; unfortunately, not all routing protocols are available for use due to license limitations. Which solution must the engineer choose?

Correct Answer: B
insert code

Question 25


Refer to the exhibit. An engineer proposed this solution for a company that requires a loop-free. Layer 2 network design. The network will run 802.1W, and all links will be 1 Gbps. If all interfaces are up as point- to- point adjacencies, what are the expected port end states based on the design?

Correct Answer: A
insert code
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