单项选择题
A.It is locally significant and must be the same throughout an area
B.It is globally significant and is used to represent the AS number
C.It is locally significant and is used to identify an instance of the OSPF database
D.It is globally significant and is used to identify OSPF stub areas
单项选择题 What OSPF command, when configured, will include all interfaces into area 0?（）
单项选择题 Refer to the exhibit.If the router Cisco returns the given output and has not had its router ID set manually, what value will OSPF use as its router ID?（）
单项选择题 A network administrator creates a layer 3 EtherChannel, bundling four interfaces into channel group 1. On what interface is the IP address configured?（）