多项选择题
At which layers of the OSI model do WANs operate (Choose two.)（）。
A.application layer
B.session layer
C.transport layer
D.network layer
E.datalink layer
F.physical layer
相关考题
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多项选择题
Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN (Choose three.)（）。
A.HDLC
B.Ethernet
C.Token Ring
D.PPP
E.FDDI
F.Frame Relay -
单项选择题
A router receives information about network 192.168.10.0/24 from multiple sources. What will the router consider the most reliable information about the path to that network（）。
A.a directly connected interface with an address of 192.168.10.254/24
B.a static route to network 192.168.10.0/24
C.a RIP update for network 192.168.10.0/24
D.an OSPF update for network 192.168.0.0/16
E.a default route with a next hop address of 192.168.10.1
F.a static route to network 192.168.10.0/24 with a local serial interface configured as the next hop -
多项选择题
Which of the following describes the roles of devices in a WAN (Choose three.)（）。
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 considered a DTE device.
F.A router is commonly considered a DCE device.
