多项选择题
A.application layer
B.session layer
C.transport layer
D.network layer
E.datalink layer
F.physical layer
多项选择题 Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN (Choose three.)（）。
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（）。
多项选择题 Which of the following describes the roles of devices in a WAN (Choose three.)（）。