Which three approaches can be used while migrating from an IPV4 addressing scheme to an IPV6 scheme?（）

• A、statically map IPV4 address to IPV6 addresses
• B、configuration IPv4 tunnels between IPV6 islands
• C、use DHCPv6 to map IPV4 addresses to IPV6 addresses
• D、use proxying and translation to translate IPV6 packets into IPV4 packets
• E、configure IPV6 directly
• F、enable dual-stack routing