Refer to the exhibit. Given the topology shown, what are two ways to allow the VPN to operate?()<br /> <img src="https://nimg.ppkao.com/2018-08/lina/2018080114364950184.jpg?sign=522b7a1e91358e2db7661f90683a428c&t=62d24b03" />
A、Use route maps on the 831
B、The 831 has IPSec NAT-Transparency (NAT-T) enabled
C、Disallow split tunneling on the 831
D、IPSec pass-through must be enabled on the Linksys
E、Use the port-mapping feature on the residential router