Which two statements about VPNv4 address are true？ （）
- AThe VPNv4 address is 128 bits long with a 128-bit long subnet mask
- BThe VPNv4 address consists of an RD and an IPv4 address
- CThe VPNv4 address is 96 bits long with a 64-bit long subnet mask
- DThe VPNv4 address is 128 bits long with a 64-bit long subnet mask
- EThe VPNv4 address consists of an RT and an IPv4 address
- FThe VPNv4 address is 96 bits long with a 32-bit long subnet mask