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Exam 300-101 topic 1 question 426 discussion

Actual exam question from Cisco's 300-101
Question #: 426
Topic #: 1
[All 300-101 Questions]

Refer to the exhibit.

Which statement is correct regarding the operation of NAT-PT between the IPv4 and IPv6 networks shown?

  • A. The router will determine the IPv4 destination address.
  • B. The source IPv6 host can use DNS to determine the IPv6-to-IPv4 address mapping.
  • C. The host is statically configured with the IPv6-to-IPv4 address mapping.
  • D. ICMP can be used to determine the IPv6-to-IPv4 address mapping.
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Suggested Answer: B 🗳️
by Bastex at Aug. 29, 2019, 7:12 p.m.

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CraigB83
4 years, 6 months ago
I would say B is correct Dynamic NAT-PT translation operation requires at least one static mapping for the IPv4 Domain Name System (DNS) server https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_nat/configuration/15-mt/nat-15-mt-book/ip6-natpt.html
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abrahamtas
5 years, 5 months ago
Correct answer is B. Bastex's link ; Dynamic NAT-PT translation operation requires at least one static mapping for the IPv4 Domain Name System (DNS) server.
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Bastex
5 years, 8 months ago
A "One of the benefits of NAT-PT is that no changes are required to existing hosts if NAT-PT is configured, because all NAT-PT configurations are performed at the NAT-PT device." https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_nat/configuration/15-mt/nat-15-mt-book/ip6-natpt.html Hosts knows nothing about mapping.
upvoted 1 times
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