CCNA: Cisco Certified Network Associate — Question 1344

A network engineer is installing an IPv6-only capable device. The client has requested that the device IP address be reachable only from the internal network.
Which type of IPv6 address must the engineer assign?

Answer options

• A. IPv4-compatible IPv6 address
• B. unique local address
• C. link-local address
• D. aggregatable global address

Correct answer: B

Explanation

The correct answer is B, unique local address, as it is specifically designed for use within a single organization and not routable on the public internet. Option A is incorrect because IPv4-compatible addresses are for transitioning from IPv4 to IPv6. Option C, link-local address, is used for communication within a single link and isn't routable beyond that link. Option D, aggregatable global address, is meant for global routing on the internet, which does not meet the internal accessibility requirement.