What is 802.1X primarily used for?

What is 802.1X primarily used for?

• A. Port-based network access control and authentication
• B. IP routing
• C. DNS resolution
• D. Wireless data encryption

Answer: (A)

802.1X is a port-based network access control and authentication mechanism. It works at the point where a device connects to the network, requiring the client (supplicant) to prove its identity before the port is allowed to carry normal traffic. The authenticator (a switch port or wireless access point) forwards the authentication request to an authentication server (typically through RADIUS). During the exchange, the client, authenticator, and server collaborate to decide whether access should be granted; if authentication succeeds, the port opens for usual traffic; if not, the port stays restricted or blocked. This is not about routing, DNS resolution, or encryption itself—though it’s commonly used with secured wireless setups (like WPA2-Enterprise) to enable strong authentication.

802.1X is a port-based network access control and authentication mechanism. It works at the point where a device connects to the network, requiring the client (supplicant) to prove its identity before the port is allowed to carry normal traffic. The authenticator (a switch port or wireless access point) forwards the authentication request to an authentication server (typically through RADIUS). During the exchange, the client, authenticator, and server collaborate to decide whether access should be granted; if authentication succeeds, the port opens for usual traffic; if not, the port stays restricted or blocked. This is not about routing, DNS resolution, or encryption itself—though it’s commonly used with secured wireless setups (like WPA2-Enterprise) to enable strong authentication.