What is one difference between captive portal authentication and 802.1X authentication?
What is one difference between captive portal authentication and 802.1X authentication?
802.1X authentication occurs at Layer 2, while captive portal authentication occurs at Layer 3. This is because 802.1X uses the Extensible Authentication Protocol (EAP), which operates at the Data Link Layer (Layer 2) of the OSI model. Captive portal authentication, on the other hand, typically involves redirecting the user to a web page after they have already connected to the network, which takes place at the Network Layer (Layer 3).
Answer A is nonsense. 802.1x can authenticate both users and clients. Answer B is even more nonsense as it says that 802.1x never uses encryption which it always does. Answer C is correct. 802.1x always uses EAP (authenticating either a user or client, can be either one of them). EAP is a layer 2 protocol.
Answer C is a correct
The answer should be A, that 802.1x will authenticate the client, and captive portal will authenticate the user
If you look at the MM, it shows the selection L2 and L3 authentication
Answer is B: In case of 802.1X Authentication , Client is authenticated before getting IP address. In case of Captive Portal Authentication , Client is authenticated after getting IP address so that he can access the web Page (Captive Web Portal) for authenticating