A CDE Definition
The identifying of packets for quality of service (QoS). Packets can be classified by source and destination ports and address and protocol type. See TOS.
(1) See terms of service.
(2) (Type Of Service) A field in an IP packet (IP datagram) that is used for quality of service (QoS). The TOS field is 8 bits, broken into five subfields.
(3) (Tape Operating System) An OS for IBM's System/360 Model 30 in the mid-1960s. It was superseded by DOS/360.
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