DiffServ Code Point
Differentiated Services Code Point (DSCP) is a 6-bit field in the header of IP packets for packet classification purposes. DSCP replaces the outdated IP precedence, a 3-bit field in the Type of Service byte of the IP header originally used to classify and prioritize types of traffic.
In December 1998, RFC 2474 replaced the ToS field with the DiffServ field, in which a range of eight values (class selector) is used for backward compatibility with IP precedence.
Some references for DSCP are:
- RFC 2474: Definition of the Differentiated Services Field (DS Field)
- Cisco: Implementing Quality of Service Policies with DSCP
- Blocking ASPROX_SQL injection attacks by configuring Cisco Routers, CiscoNews, blogs.
See also
Differentiated services - Main Article.
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