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單項選擇題

Router A is unable to reach Router B.Both routers are running ios version 12.0.After reviewing the command output and graphic,what is the most likely cause of the problem?（）

A.incorrect bandwidth configuration
B.incorrect LMI configuration
C.incorrect map statement
D.incorrect IP address

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單項選擇題

Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?（）

A.IETF
B.HDLC
C.Q9333-A Annex A
D.ANSI Annex D

單項選擇題

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

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