CCNA: Cisco Certified Network Associate — Question 1295

Which type of IPv4 address must be assigned to a server to protect it from external access and allow only internal users access while restricting internet access?

Answer options

• A. private
• B. public
• C. global unicast
• D. multicast

Correct answer: A

Explanation

The correct answer is A, private, because private IPv4 addresses are specifically designed for internal networks and are not routable on the internet, thereby protecting the server from external access. In contrast, public addresses (B) can be accessed from the internet, global unicast addresses (C) are routable across the internet, and multicast addresses (D) are used for one-to-many communication and do not fit the requirement of restricting internet access.