mac_address

    Required.

    Specifies the physical network adddress (the hardware address) on
    an FDDI, Ethernet, or Token Ring LAN segment to be mapped to an
    IP address.

    For mac_address, specify hh-hh-hh-hh-hh-hh, where hh are pairs of
    hexadecimal digits.

 host

    Required.

    Specifies the host on the targeted LAN segment. If you do not
    supply a host name, you must supply its corresponding IP address.