Definitions for "Type of Service"
A field within an IP packet that can be used to request priority treatment of the packet by the network. The ToS field and mechanism have been replaced by Differentiated Services (DiffServ) and DiffServ Codepoints (DSCPs).
A byte in the IP header that defines the Type of Service that should be given to that packet. Two types are implemented: IP Precedence bits (mostly in Cisco equipment) or DiffServ (IETF standard). When used for IP Precedence, utilizes bits 0-2 to signify 8 priority values 0-7. When used as DiffServ Code Point Description (DSCP), utilizes only 6 out of the 8 bits. IP Precedence and DiffServ are prioritizing methods for IP traffic going through the network. By setting the Type of Service (ToS) bits in accordance with network policy, end‑to‑end QoS can be achieved in a heterogeneous environment.
A code located on the HCFA form that indicates the type of service performed.
Keywords:  see, tos
See ToS.