Fibre Channel for Mass Storage

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2.8. Classes of Service

Fibre Channel classes of service are managed by the FC-2 level. Currently there are three classes of service defined by the standard:

Class 1— Dedicated connection service.
- Connection-oriented
- Acknowledged delivery
Class 2— Multiplexed service.
- Connectionless
- Acknowledged delivery
Class 3— Datagram service. This is the current class of service provided for by Hewlett-Packard. The device drivers determine if data is not received and needs to be retransmitted.
- Connectionless
- Unacknowledged delivery

Other classes of service may follow. However, they are currently not defined.

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