多項(xiàng)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(xiàng)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(xiàng)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.