多项选择题
A. It is logically 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.
单项选择题 A router has EIGRP configured as the only routing protocol. How does EIGRP respond if there is no feasible successor route to a destination network and the successor route fails?（）
多项选择题 Which table of EIGRP route information are held in RAM and maintained through the use of hello and update packets?（）
多项选择题 Which statements are true regarding classless routing protocols?（）