Refer to the exhibit.<br /> <img src="https://nimg.ppkao.com/2018-07/wenxueying/2018073015541779070.png?sign=d8fad0c72dc69fced0c3cf3cf8e65295&t=62d49722" /><br /> What are the two options that are used to provide High Availability IPsec?()
A、RRI
B、IPsec Backup Peerings
C、Dynamic Crypto Ma
D、HSRP
E、IPsec Stateful Switchover (SSO)
F、Dual Router Mode (DRM) IPsec