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單項(xiàng)選擇題

Which command is used on the local router to invoke a loopback mode on a remote ERX Edge Router?（）

A.A
B.B
C.C
D.D

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單項(xiàng)選擇題

Which command prompts an ERX Edge Router to go into a loopback mode on T1 number 1 when a command is received from a remote ERX Edge Router?（）

A.A
B.B
C.C
D.D

單項(xiàng)選擇題

Which control expression must be the last line in all macros?（）

A.A
B.B
C.C
D.D

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