多項選擇題Which of the following are key characteristics of PPP?()

A.can be used over analog circuits
B.maps Layer 2 to Layer 3 address
C.encapsulates several routed protocols
D.supports IP only
E.provides error correction


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1.單項選擇題There are no boot system commands in arouter configuration in NVRAM.What is the fallback sequence that router will use to find an ios during reload?()

A.Flash,TFTPserver,ROM
B.Flash,NVRAM,ROM
C.ROM,NVRAM,TFTP server
D.NVRAM,TFTP server,ROM
E.TFTP server,Flash,NVRAM

2.多項選擇題Which two statements about the use of VLANs to segment a network are true? ()

A.VLANs increase the size of collision domains.
B.VLANs allow logical grouping of users by function.
C.VLANs simplify switch administration.
D.VLANs enhance network security.

3.單項選擇題A switch is configured with all ports assigned to vlan 2 with full duplex FastEthernet to segment existing departmental traffiC.What is the effect of adding switch ports to a new VLAN on the switch?()

A.More collision domains will be created.
B.IP address utilization will be more efficient.
C.More bandwidth will be required than was needed previously.
D.An additional broadcast domain will be created.

4.單項選擇題Which switch would STP choose to become the root bridge in the selection process?()

A.32768:11-22-33-44-55-66
B.32768:22-33-44-55-66-77
C.32769:11-22-33-44-55-65
D.32769:22-33-44-55-66-78

5.單項選擇題A default Frame Relay WAN is classified as what type of physical network?()

A.point-to-point
B.broadcast multi-access
C.nonbroadcast multi-access
D.nonbroadcast multipoint.broadcast point-to-multipoint

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