af
    The address family used in later references to the socket.
    Addresses specified in subsequent operations using the socket are
    interpreted according to this family. Use one of the following:
    o  AF_INET for the IPv4 address family
    o  AF_INET6 for the IPv6 address family
    o  TCPIP$C_AUXS
       For a network application server with the LISTEN flag enabled,
       you specify the TCPIP$C_AUXS address family to obtain the
       connected device socket created by the auxiliary server in
       response to incoming network traffic.
 type
    The socket types are:
    o  SOCK_STREAM - Provides sequenced, reliable, two-way,
       connection-based byte streams with an available out-of-band
       data transmission mechanism.
    o  SOCK_DGRAM - Provides datagram transmissions. A datagram is a
       connectionless, unreliable data transmission mechanism.
    o  SOCK_RAW - Provides access to internal network interfaces.
       Available only to users with the SYSPRV privilege.
 protocol
    The protocol to be used with the socket. Normally, only a single
    protocol exists to support a particular socket type using a given
    address format. However, if many protocols exist, a particular
    protocol must be specified with this argument. Use the protocol
    number that is specific to the address family.