Type of Service. The BIT Format is consistent with the IP standard: + | | | | | PRECEDENCE | TYPE OF SERVICE | 0 | | | | | + 0 1 2 3 4 5 6 7 At present, only 1 BYTE will be used, bits 0 (MSB) - 7 (LSB). The precedence consists of 3 BITS (0-2): 111 - Network Control 110 - Internetwork Control 101 - CRITIC/ECP 100 - Flash Override 011 - Flash 010 - Immediate 001 - Priority 000 - Routine The TOS values BITS (3-5): Bit 3 is the Delay: 0 = Normal Delay, 1 = Low Delay. Bit 4 is the Throughput: 0 = Normal Throughput, 1 = High Throughput. Bit 5:is the Reliability: 0 = Normal Reliability, 1 = High Reliability. Bits 6 & 7 are for future use and their current value is 0.