CompTIA Network+ (N10-006) — Question 83

In a network that requires multilayer switches to use authentication via RADIUS/TACACS+, which of the following access control models will the switches need to utilize?

Answer options

• A. 802.1q
• B. 802.3af
• C. PKI
• D. 802.1x

Correct answer: D

Explanation

The correct answer is D, 802.1x, as it is specifically designed for network access control and works with authentication protocols like RADIUS and TACACS+. The other options, such as 802.1q and 802.3af, relate to VLAN tagging and Power over Ethernet respectively, while PKI refers to Public Key Infrastructure, which is not directly used for switch authentication in this context.