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Exam 300-101 All Questions

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Exam 300-101 topic 1 question 6 discussion

Actual exam question from Cisco's 300-101
Question #: 6
Topic #: 1
[All 300-101 Questions]

Which statement about the use of tunneling to migrate to IPv6 is true?

  • A. Tunneling is less secure than dual stack or translation.
  • B. Tunneling is more difficult to configure than dual stack or translation.
  • C. Tunneling does not enable users of the new protocol to communicate with users of the old protocol without dual-stack hosts.
  • D. Tunneling destinations are manually determined by the IPv4 address in the low-order 32 bits of IPv4-compatible IPv6 addresses. C
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Suggested Answer: Explanation 🗳️
Using the tunneling option, organizations build an overlay network that tunnels one protocol over the other by encapsulating IPv6 packets within IPv4 packets and
IPv4 packets within IPv6 packets. The advantage of this approach is that the new protocol can work without disturbing the old protocol, thus providing connectivity between users of the new protocol.
Tunneling has two disadvantages, as discussed in RFC 6144:
✑ Users of the new architecture cannot use the services of the underlying infrastructure.
✑ Tunneling does not enable users of the new protocol to communicate with users of the old protocol without dual-stack hosts, which negates interoperability.
Reference:
http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/enterprise-ipv6-solution/white_paper_c11-676278.html
by romizone at Feb. 15, 2025, 3:27 a.m.

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romizone
2 months, 2 weeks ago
Selected Answer: C
C. The correct answer is C. Tunneling requires dual-stack hosts at the tunnel endpoints to enable communication between IPv4 and IPv6 networks. The tunnel itself just encapsulates one protocol inside the other for transport, but doesn't perform protocol translation.
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