Refer to the exhibit. Given the topology shown, what are two ways to allow the VPN to operate?（）
- AUse route maps on the 831
- BThe 831 has IPSec NAT-Transparency (NAT-T) enabled
- CDisallow split tunneling on the 831
- DIPSec pass-through must be enabled on the Linksys
- EUse the port-mapping feature on the residential router