多项选择题
A.It is locally significant.
B.It is globally significant.
C.It is needed to identify a unique instance of an OSPF database.
D.It is an optional parameter required only if multiple OSPF processes are running on the router.
E.All routers in the same OSPF area must have the same process ID if they are to exchange routing information.
多项选择题 To configure the VLAN trunking protocol to communicate VLAN information between two switches, what two requirements must be met? （）
单项选择题 Refer to the exhibit.What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown？（）
单项选择题 If an ethernet port on a router was assigned an IP address of 172.16.112.1/20, what is the maximum number of hosts allowed on this subnet（）。