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單項(xiàng)選擇題

Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network addres?（）

A. 172.16.16.0
B. 172.16.24.0
C. 172.16.0.0
D. 172.16.28.0

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單項(xiàng)選擇題

Which command can be used to verify the DLCI destination address in a Frame Relay static configuration?（）

A. show frame-relay end-to-end
B. show frame-relay map
C. show frame-relay lmi
D. show frame-relay pvc

單項(xiàng)選擇題

Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?（）

A. Frame Relay
B. HDLC
C. x.25
D. PPP