CCNA: Cisco Certified Network Associate — Question 983

In which circumstance would a network architect decide to implement a global unicast subnet instead of a unique local unicast subnet?

Answer options

• A. when the subnet must be available only within an organization
• B. when the subnet does not need to be routable
• C. when the addresses on the subnet must be equivalent to private IPv4 addresses
• D. when the subnet must be routable over the internet

Correct answer: D

Explanation

The correct answer is D because global unicast addresses are designed to be routable on the internet, unlike unique local addresses which are intended for internal use only. Options A, B, and C focus on scenarios where internet routing is not necessary, which do not justify the use of a global unicast subnet.