OSI provided/provides fan-out at transport, session, presentation, and CASE levels (the latter using the application context). Almost certainly overkill compared with TCP, that fans out essentially only ones (above TCP) using the TCP port number, but the argument was that this architecture did not constrain implemenation architectures (and in particular mult-vendor solutions for the various layers) as much as a single level of fan-out.
John L
Eduardo Figoli wrote:
Hi,
Can someone explain me the main usage for APPLICATION-CONTEXT and OPERATION-PACKAGE classes.
I have read ASN.1 book but couldn't understand their purpose.
Are them part of ASE make up, what advantages are on the use of ASE for protocol spec?
thanks,
Eduardo Figoli
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