CCNA: Cisco Certified Network Associate — Question 85

Which goal is achieved by the implementation of private IPv4 addressing on a network?

Answer options

• A. provides an added level of protection against Internet exposure
• B. provides a reduction in size of the forwarding table on network routers
• C. allows communication across the Internet to other private networks
• D. allows servers and workstations to communicate across public network boundaries

Correct answer: A

Explanation

The correct answer is A, as private IPv4 addressing helps to shield internal network devices from direct access on the Internet, enhancing security. Option B is incorrect because private addresses do not reduce forwarding table size; routers typically manage routes for both private and public addresses. Option C is false since private IP addresses cannot communicate directly over the Internet. Option D is also incorrect as private addresses cannot traverse public network boundaries without a NAT (Network Address Translation) mechanism.