What is eXtended Authentication (XAuth)?

What is eXtended Authentication (XAuth)?
A . It is an IPsec extension that forces remote VPN users to authenticate using their local ID.
B . It is an IPsec extension that forces remote VPN users to authenticate using their credentials (username and password).
C . It is an IPsec extension that authenticates remote VPN peers using a pre-shared key.
D . It is an IPsec extension that authenticates remote VPN peers using digital certificates.

Answer: B

Explanation:

The correct answer is:

B. It is an IPsec extension that forces remote VPN users to authenticate using their credentials (username and password).

eXtended Authentication (XAuth) is an IPsec extension that adds additional authentication for remote VPN users after the initial IPsec phase 1 and phase 2 negotiations. XAuth requires users to provide their credentials (username and password) in addition to the standard IPsec authentication, enhancing the security of the VPN connection.