单项选择题

In the Cisco Resilient Ethernet Protocol （REP）， how many ports are always blocking？（）

A.zero
B.at least one
C.at least two
D.at least four
E.at least three

点击查看答案&解析

上一题目录下一题

相关考题

多项选择题

Which two statements about OSPF IPv6 routing are true？（）

A.It requires OSPF version 3.
B.automatically detects neighbors over NHMA interfaces
C.It supports encryption using
D.It uses LSA type 9
E.It uses LSA type 8