多项选择题
A.OSPF maintains smaller routing tables than RIP。 B.OSPF cost metric is based on number of hops。 C.OSPF only sends routing updates only when necessary。 D.OSPF supports VLSM and allows more efficient use of IP addresses。
A.Type1 LSA B.Type2 LSA C.Type4 LSA D.Type5 LSA E.Type7 LSA
A.终端 B.关联 C.根节点 D.描述符