多项选择题
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?（）
单项选择题 Refer to the exhibit.Which statement describes DLCI 17?（）
单项选择题 The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration?（）