100% Free 300-420 Practice Exam Questions (2026)

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Cisco 300-420 Dumps & Practice Test Questions 2026

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Total 381 Questions | Updated On: Aug 24, 2026

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Question 1

A company wants to deploy IPv6 within its existing network infrastructure. All current infrastructure equipment supports IPv6, and the company wants a migration strategy that must not require purchasing additional equipment The plan must keep operational management costs low. support IPv6 multicast, and allow applications to migrate using DNS. Which strategy must the company choose?

A : hybrid ISATAP tunnel model

B : hybrid manual tunnel model

C : service block model

D : dual-stack model

Answer: D

Question 2

Refer to the exhibit. As part of a design review of redistribution, a client requested that R2 be preferred over R3 for traffic passing toward the EIGRP domain. Which method meets this design requirement?

A : Redistribute EIGRP into OSPF with metric-type E1 on R2 and metric-type E2 on R3.

B : Remove the mutual redistribution on R3.

C : Redistribute OSPF into EIGRP with metric 10000 100 255 1 1500 on R2 and metric 10 1000 255 1 1500 on R3.

D : Redistribute EIGRP into OSPF with metric-type E2 on R2 and metric-type E1 on R3.

Answer: A

Question 3

A network engineer must design an MSDP multicast solution to provide RP resilience in a network with two separate domains. Also, multicast sources and receivers must register with the local RP. Which solution must the engineer choose?

A : Configure the RP has value to 0, and traffic will route to the closest RP

B : Configure the RP loopback interface with the same IP address/32, and traffic will route to the closest RP

C : Configure the RP group ranges to split the multicast traffic, and traffic will route to the longest match

D : Configure the RP priority with the same value, and traffic will route to the closest RP

Answer: B

Question 4

What is a benefit of using VRRPv3 as compared to VRRPv2?

A : VRRPv3 supports IPv4 and IPv6

B : VRRPv3 supports authentication

C : VRRPv3 supports preemption

D : VRRPv3 supports stateful switchover

Answer: A

Question 5

Refer to the exhibit. Which two technologies must an engineer include in the design to prevent Layer 2 loops in this topology? Choose two.

A : loop guard on uplink

B : root guard on downlink

C : BPDU guard on downlink

D : root guard on uplink

E : BPDU guard on uplink

Answer: A,B

Page: 1 / 77

Total 381 Questions | Updated On: Aug 24, 2026

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