多项选择题
A.to confine network instability to single areas of the network.
B.to reduce the complexity of router configuration
C.to speed up convergence
D.to lower costs by replacing routers with distribution layer switches
E.to decrease latency by increasing bandwidth
F.to reduce routing overhead
单项选择题 Which parameter or parameters are used to calculate OSPF cost in cisco routers?（）
单项选择题 You are working in a data center environment and are assigned the address range 10.188.31.0/23.You are asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts each.Which IP address range meets these requirements?（）
单项选择题 Which IPv6 address is the equivalent of the IPv4 interface loopback address 127.0.0.1?（）