Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 324

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

Answer options

• 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

Correct answer:

Explanation

Option C is correct because tunneling requires a dual-stack setup to facilitate communication between users of both protocols. Options A and B are incorrect, as tunneling can be as secure and as easy to configure as dual stack or translation depending on the implementation. Option D is misleading because while IPv4-compatible IPv6 addresses do use the low-order bits, the statement does not accurately reflect the general principle of tunneling.