CompTIA Network+ (N10-007) — Question 647

A network administrator wants to employ a username and password authentication system for guest WiFi. Which of the following is the BEST option to provide this type of authentication?

Answer options

• A. Port security
• B. MAC filtering
• C. Network access control
• D. Captive portal

Correct answer: D

Explanation

The best choice for implementing a username and password authentication system is a Captive portal, as it allows users to enter credentials before accessing the network. Port security and MAC filtering primarily focus on device identification and access control based on hardware addresses, while Network access control encompasses a broader range of security policies but is less specific for guest WiFi authentication.