Class of Service

The term Class of Service (CoS ) corresponds to the German term service class and has depending on the application ( Context) different meanings:

Class of Service on the LAN

With CoS, we describe a method for labeling and subsequent prioritization in IP -based networks, which are standardized by IEEE 802.1p.

CoS enables targeted prioritization, while explicit bandwidth guarantees or restrictions are furnished with Quality of Service ( QoS).

After the still widespread classification three specific class - of-service categories can be distinguished:

  • Application Class 1: Language;
  • Application Class 2: mission-critical data transfer, such as SAP, ERP or video conferencing;
  • Application Class 3: geschäftsunkritische applications like e- mail and Web browsing.

Class of Service on the WAN

Many Multi-Protocol Label Switching ( MPLS) providers offer but also a more sophisticated Klassifiziering after the Differentiated Services Code Point (DSCP ) method.

Class of Service in Telecommunications

The old term exchange authorization is rarely used in today's telecommunications networks. Today, telecommunications networks are used for a variety of services: voice, video, presence, instant messaging, chat.

CoS is a more generic term for various roles.

Asynchronous Transfer Mode Frame Relay Service Advertising Protocol
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