单项选择题

Refer to the exhibit.How many broadcast domains exist in theexhibited topology？（）

A.one
B.two
C.three
D.four
E.five
F.six

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单项选择题

As a CCNA candidate,you must have a firm understanding of the IPv6 address structure.Refer to IPv6 address,could you tell me how many bits are included in each filed?（）

A.24
B.4
C.3
D.16

单项选择题

The Frame Relay network in the diagram is not functioning properly.What is the cause of the problem?（）

A.The Gallant router has the wrong LMI type configured
B.Inverse ARP is providing the wrong PVC information to the Gallant router
C.The S3 interface of the Steele router has been configured with the frame-relay encapsulation ietf command
D.The frame-relay map statement in the Attalla router for the PVC to Steele is not correct
E.The IP address on the serial interface of the Attalla router is configured incorrectly