200-301 Question 398
Single answerA network administrator notices unauthorized devices connecting to the corporate wireless network. To prevent this, the administrator implements a security mechanism that requires each device to authenticate using unique credentials before accessing the network. Which security measure is the administrator using?
- A
WPA3 encryption
- B
MAC address filtering
- C
802.1X authentication
- D
SSID hiding
Show answer and explanation
Correct answer: C
Explanation
802.1X authentication is a secure network access control method that ensures only authorized devices and users can connect to the network. Unlike MAC address filtering or SSID hiding, 802.1X provides robust authentication by requiring unique credentials for each device, thus preventing unauthorized access.
- A. Incorrect.
WPA3 encryption is a security protocol that encrypts wireless communication but does not enforce unique device authentication. It primarily secures data transmission.
- B. Incorrect.
MAC address filtering allows or denies access based on a device's MAC address, but it is not a robust authentication method because MAC addresses can be spoofed.
- C. Correct.
802.1X authentication requires devices to authenticate using unique credentials, such as usernames and passwords or certificates, before being granted network access. This directly addresses the issue of unauthorized devices.
- D. Incorrect.
SSID hiding only prevents the wireless network from being easily discoverable. It does not authenticate devices or prevent unauthorized access effectively.