问题：

[多选]

You need to decide on the best router redundancy protocol to use in the Company network.
 Which  two statements are true about HSRP， VRRP， and GLBP？（）

A .  GLBP and VRRP allow for MD5 authentication， whereas HSRP does not.
B .  HSRP allows for multiple upstream active links being simultaneously used， whereas GLBP  does not.
C .  GLBP allows for router load balancing of traffic from a network segment without the different  host IP configurations required to achieve the same results with HSRP.
D .  Unlike HSRP and VRRP， GLBP allows automatic selection and simultaneous use of multiple  available gateways.
E .  GLBP allows for router load balancing of traffic from a network segment by utilizing the creation  of multiple standby groups.