单项选择题
A. 24
B. 4
C. 3
D. 16
单项选择题 The Frame Relay network in the diagram is not functioning properly. What is the cause of the problem?（）
单项选择题 A default Frame Relay WAN is classified as what type of physical network?（）
单项选择题 The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.0 0.0.0.255 any What is the effect of this access list configuration?（）