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單項(xiàng)選擇題

An authentication request for a PPP over ATM client has been returned to the router with an address of 255.255.255.254.
What does this indicate to the router?()

A. A static IP address is used.
B. An unnumbered address is used.
C. The returned RADIUS address is used.
D. The IP address-pool configuration is used.

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