Regarding the statement of NAC, which of the following descriptions is wrong?

Question

Options

• ANAC (Network Admission Control) is called Network Admission Control
• BNAC is an end-to-end security structure, including 802.1x, MAC and Portal authentication
• CNAC access terminal equipment, if Portal authentication is used, client software needs to be
• DThe access terminal of NAC adopts 802.1x authentication, and client software needs to be

• A
  12% (5)
• B
  5% (2)
• C
  78% (32)
• D
  5% (2)

Explanation

Option C is wrong because Portal authentication does not require client software to be installed on the access terminal. Portal (web-based) authentication works through a standard web browser - users are redirected to a login page, making it clientless by design. This is precisely what distinguishes Portal from 802.1x.

• A is correct: NAC does stand for Network Admission Control (the full name matches the abbreviation).
• B is correct: NAC is indeed an end-to-end security framework that encompasses 802.1x, MAC address-based, and Portal authentication methods.
• D is correct: 802.1x does require client software (called a "supplicant") installed on the endpoint to handle the EAP authentication exchange with the authenticator.

Memory tip: Think of Portal as a "web portal" - just like logging into a hotel Wi-Fi through your browser, no extra software needed. 802.1x is the "strict" method that requires a dedicated supplicant client, while Portal is the "easy access" method that only needs a browser. If a question says Portal needs software, that's the trap - it's always wrong.

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