多选题What are two reasons for using a virtual link in OSPF?（）AProvides fast convergence times.BSupports connections of multiple backbones.CEliminates the need for a Designated Router.DSupports non direct connections to the backbone.
题目
多选题
What are two reasons for using a virtual link in OSPF?（）
A
Provides fast convergence times.
B
Supports connections of multiple backbones.
C
Eliminates the need for a Designated Router.
D
Supports non direct connections to the backbone.