单项选择题
A.the operation of VTP
B.a method of VLAN trunking
C.an approach to wireless LAN communication
D.the process for root bridge selection
E.VLAN pruning vlan
单项选择题 The network administrator needs to address seven LANs. RIP version 1 is the only routing protocol in use on the network and subnet 0 is not being used. What is the maximum number of usable IP addresses that can be supported on each LAN if the organization is using one class C address block?（）
多项选择题 Why do large OSPF networks use a hierarchical design?（）
单项选择题 Which parameter or parameters are used to calculate OSPF cost in cisco routers?（）