group) parameters.  The format for this option is as follows:

          +--------+--------+---//---+---//---+---//---+---//---+
          |10000010|00001011|SSS  SSS|CCC  CCC|HHH  HHH|  TCC   |
          +--------+--------+---//---+---//---+---//---+---//---+
           Type=130 Length=11

        Security (S field):  16 bits

          Specifies one of 16 levels of security (eight of which are
          reserved for future use).

            00000000 00000000 - Unclassified
            11110001 00110101 - Confidential
            01111000 10011010 - EFTO
            10111100 01001101 - MMMM
            01011110 00100110 - PROG
            10101111 00010011 - Restricted
            11010111 10001000 - Secret
            01101011 11000101 - Top Secret
            00110101 11100010 - (Reserved for future use)
            10011010 11110001 - (Reserved for future use)
            01001101 01111000 - (Reserved for future use)
            00100100 10111101 - (Reserved for future use)
            00010011 01011110 - (Reserved for future use)
            10001001 10101111 - (Reserved for future use)
            11000100 11010110 - (Reserved for future use)
            11100010 01101011 - (Reserved for future use)






 

                                                          September 1981
Internet Protocol
Specification



        Compartments (C field):  16 bits

          An all zero value is used when the information transmitted is
          not compartmented.  Other values for the compartments field
          may be obtained from the Defense Intelligence Agency.

        Handling Restrictions (H field):  16 bits

          The values for the control and release markings are
          alphanumeric digraphs and are defined in the Defense
          Intelligence Agency Manual DIAM 65-19, "Standard Security
          Markings".

        Transmission Control Code (TCC field):  24 bits

          Provides a means to segregate traffic and define controlled
          communities of interest among subscribers. The TCC values are
          trigraphs, and are available from HQ DCA Code 530.

        Must be copied on fragmentation.  This option appears at most
        once in a datagram.

      Loose Source and Record Route

        +--------+--------+--------+---------//--------+
        |10000011| length | pointer|     route data    |
        +--------+--------+--------+---------//--------+
         Type=131

        The loose source and record route (LSRR) option provides a means
        for the source of an internet datagram to supply routing
        information to be used by the gateways in forwarding the
        datagram to the destination, and to record the route
        information.

        The option begins with the option type code.  The second octet
        is the option length which includes the option type code and the
        length octet, the pointer octet, and length-3 octets of route
        data.  The third octet is the pointer into the route data
        indicating the octet which begins the next source address to be
        processed.  The pointer is relative to this option, and the
        smallest legal value for the pointer is 4.

        A route data is composed of a series of internet addresses.
        Each internet address is 32 bits or 4 octets.  If the pointer is
        greater than the length, the source route is empty (and the
        recorded route full) and the routing is to be based on the
        destination address field.



 

September 1981                                                          
                                                       Internet Protocol
                                                           Specification