During the Portal authentication process, which of the following authentication request messages does the Portal server send to the access device?

Question

Options

• AHTTP POSTA
• BREQ AUTH
• CREQ CHALLENGE
• DHTTP GET

• A
  4% (2)
• B
  79% (38)
• C
  6% (3)
• D
  10% (5)

Explanation

REQ_AUTH is the specific authentication request message that the Portal server sends to the access device, carrying the user's credentials (typically a hashed password using the challenge value) to initiate the RADIUS-based authentication process on behalf of the user.

Why the distractors are wrong:

• A (HTTP POSTA) is not a real protocol message - HTTP uses GET and POST methods for browser-to-portal communication, not server-to-access-device signaling.
• C (REQ_CHALLENGE) is also sent by the Portal server to the access device, but it comes before REQ_AUTH to request a challenge value for password hashing - it is a preliminary step, not the authentication request itself.
• D (HTTP GET) is a browser-side HTTP method used when a client first hits the portal page; it plays no role in the Portal-server-to-access-device protocol exchange.

Memory tip: Think of the flow as two Portal→access-device messages in sequence - "Request a Challenge, then Request Auth" (RC → RA). The question asks specifically about the authentication request, so pick the one with "AUTH" in the name: REQ_AUTH.

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