References

   [1]  USA Standard Code for Information Interchange, USASI X3.4-1968.

   [2]  Postel, J., "User Datagram  Protocol," RFC 768, USC/Information
        Sciences Institute, 28 August 1980.

   [3]  Postel, J., "Telnet Protocol Specification," RFC 764,
        USC/Information Sciences Institute, June, 1980.

   [4]  Braden, R., Editor, "Requirements for Internet Hosts --
        Application and Support", RFC 1123, USC/Information Sciences
        Institute, October 1989.