In the MAC address authentication scenario, the user does not need to manually enter the user name and password. Which of the following is used as the authenticated user name?

Question

Options

• AAccount number
• BIP address
• CInterface number
• DMAC address

• A
  7% (3)
• B
  2% (1)
• C
  12% (5)
• D
  78% (32)

Explanation

In MAC address authentication, the device's MAC address is automatically used as both the username and password, eliminating the need for manual credential entry - this is precisely why option D is correct. Option A (account number) is wrong because no user account is created or referenced; the device identifier substitutes for one. Option B (IP address) is incorrect because IP addresses are assigned dynamically and aren't reliable device identifiers for authentication purposes. Option C (interface number) is a network port concept, not a user identity, and has no role in authentication credentials.

Memory tip: Think of MAC as "My Automatic Credential" - the MAC address is the credential, so the device authenticates itself without any human input.

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