IPv4 IPv6 Addresses are 32 bits (4 bytes) in length. Addresses are 128 bits (16 bytes) in length Address (A) resource records in DNS to map host names to IPv4 addresses. Address (AAAA) resource records in DNS to map host names to IPv6 addresses. Pointer (PTR) resource records in the IN-ADDR.ARPA DNS domain to map IPv4 addresses to host names. Pointer (PTR) resource records in the IP6.ARPA DNS domain to map IPv6 addresses to host names. IPSec is optional and should be supported externally IPSec support is not optional Header does not identify packet flow for QoS handling by routers Header...
