What are three benefits of GLBP?（）

A、GLBP supports up to eight virtual forwarders per GLBP group

B、GLBP supports clear text and MD5 password authentication between GLBP group members

C、GLBP is an open source standardized protocol that can be used with multiple vendors

D、GLBP supports up to 1024 virtual routers

E、GLBP can load share traffic across a maximum of four routers

F、GLBP elects two AVGs and two standby AVGs for redundancy