多项选择题
A. Encapsulates several different types of routing protocols.
B. Supports only IP.
C. Can be used over analog circuits.
D. Is proprietary to Cisco
E. Supports error correction.
多项选择题 What are some common layer 2 encapsulations for a WAN link?（）
单项选择题 Which WAN service utilizes two different encapsulation types (one for data and one for signaling) on its data link layer?（）
单项选择题 A router receives a packet on interface 172.16.45.66/26. The source IP of the packet is 172.16.45.127/26 and the destination is 172.16.46.191/26.How will the router handle the packet?（）