Definitions of the CAS identifier are specified in [C706] section 9.5.4.

Like a connection-oriented association, the CAS holds data relevant to the client's view of a particular RPC server:

• Server's transport.

• Server's host name or address.

• Server's endpoint, or the transport's endpoint mapper endpoint if the server endpoint is unknown.

The client also caches several parameters of the server instance to improve the speed and latency of future calls:

• The optimum size of the server fragment window.

• Its maximum PDU length.

• A collection of connections.

• A flag that indicates whether the server supports the PF2_UNRELATED flag.