Exam 300-420 topic 1 question 172 discussion

Actual exam question from Cisco's 300-420

Question #: 172
Topic #: 1

Refer to the exhibit. An architect must design an IPv6 migration solution for an enterprise customer to support these requirements:
* Clients will transition to the new IPv6 network, which provides NAT64 and IPv6 DNS resolution services, using the same DNS name that points to the IPv4 address.
* The service provider will create a client-facing IPv6 interface with a new IPv6 virtual address that points to the same IPv4 DNS server.
* The service provider will support clients that use global IPv6 addresses and encapsulate IPv4 packets into IPv6 tunnels.
Which two migration solutions must the architect choose? (Choose two.)

A. Use dual-stack lite from the MPLS network to the IGR.
B. Use IPv6 tunneling from the devices to the core MPLS network.
C. Use dual-stack lite from the devices to the core MPLS network.
D. Use NAT44/64 from the MPLS network to the IGR.
E. Use NAT44/64 from the devices to the core MPLS network.

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Suggested Answer: CD 🗳️

by alemoreira at Nov. 23, 2024, 9:08 p.m.

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lucky12321

2 months, 1 week ago

Selected Answer: BE

My suggestion would be B + E. I think some information is unclear here but my explaination is as followed. Supposing this is a IPv4 only MPLS Core. E is needed for the IPv6 clients to communicate with the IPv4 only hosts/servers. B is needed (given the right interpretion of the answer) to tunnel the native IPv6 traffic thru the MPLS Core.

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alemoreira

5 months, 1 week ago

In my opinion, it should be D and E, as the use of NAT64 is a prerequisite

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Exam 300-420 topic 1 question 172 discussion

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lucky12321

alemoreira

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