CompTIA Network+ (N10-008) — Question 473

Which of the following is used to require network devices to authenticate before gaining access to a LAN?

Answer options

• A. 802.1Q
• B. 802.1X
• C. 802.11ax
• D. 802.3af

Correct answer: B

Explanation

The correct answer is B, 802.1X, which is specifically designed for port-based network access control and requires devices to authenticate before they can connect to the LAN. Options A (802.1Q), C (802.11ax), and D (802.3af) pertain to VLAN tagging, wireless networking standards, and Power over Ethernet, respectively, and do not address authentication requirements for network access.