多项选择题
Which of the following describes the roles of devices in a WAN?（）
A.A CSU/DSU terminates a digital local loop
B.A modem terminates a digital local loop
C.A CSU/DSU terminates an analog local loop
D.A modem terminates an analog local loop
E.A router is commonly consideredaDTEdevice
F.A router is commonly considereda DCE device
相关考题
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单项选择题
Refer to the exhibit.What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown？（）
A.The Seria l0/0interface is passing traffic.
B.The DLCI 100 was dynamic allyallocated by the router
C.The Seria l0/0 interf aceacquired the IP address of 172.16.3.1 from a DHCP server
D.The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay cloud
E.The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP -
多项选择题
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 -
单项选择题
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
