单项选择题
A.iproute 172.10.1.20.0.0.0 atm 6/0.33
B.iproute 172.10.1.2255.255.255.0 atm 6/0.33
C.iproute 172.10.1.2255.255.255.255 172.10.1.2
D.iproute 172.10.1.2255.255.255.255 atm 6/0.33
单项选择题 A service provider is assigning a/30 subnet to each ATMPVC in a Routed 1483 environment.What is a consequence of this configuration？（）
单项选择题 A Bridged 1483 network is grouping DSL users into a single subnet.Where must the CPE work station’s default gateway point？（）
多项选择题 A Bridged 1483 service offering is grouping DSL users into a large subnet.What are three characteristics of this configuration？（）