The in_addr token contains an Internet address. This 4-byte value is an Internet Protocol address. The token has two fields: a token ID that identifies this token as an in_addr token and an Internet address. Figure A-12 shows an in_addr token.
For the Solaris 8 release, the Internet Address can be displayed as a IPv4 address using 4 bytes, or as an IPv6 address using 16 bytes to describe the type, and 16 bytes to descibe the address.