SNIA

1. [Network] A mechanism for managing traffic in a network by specifying message or packet priority or delivery acknowledgement.

Network mechanisms include identification and grouping of data packets based on a priority label (in the packet header) or via mechanisms such as "per hop behavior", defined by the IETF's Differentiated Services.

2. [Fibre Channel] The characteristics and guarantees of the transport layer of a Fibre Channel network.

Fibre Channel classes of service include connection-based services (Class 1), acknowledged frame delivery with end to end flow control (Class 2), and packetized frame datagrams (Class 3). Different classes of service may simultaneously exist in a fabric. The form and reliability of delivery in Class 3 circuits may vary with the topology.

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