多项选择题
A. The use of discontiguous subnets is not allowed
B. The use of variable length subnet masks is permitted
C. RIP v1 is a classless routing protocol
D. IGRP supports classless routing within the same autonomous system
E. RIP v2 supports classless routing
多项选择题 Which of the following statements regarding EIGRP successor routes is valid?（）
单项选择题 In what location are EIGRP successor routes stored?（）
单项选择题 A new network has been configured using OSPF as the routing protocol. With which network type will OSPF establish router adjacencies but not perform the DR/BDR election process?（）