• "Requests can be formally defined with respect to a given protocol.
• "Replies" to a given request can be formally identified by explicit unification and protocol definition, known to all agents within a distributed computation.
• Previous definition required a comparison of performance of a given application for client/server and peer-to-peer protocol usage.
• Now additionally require that degradation of performance be attributed to missing/additional messages of a certain kind.

"Exception" messages cannot be unified with a reply.

Replies to "Trace" are not exception messages.

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©2006 Charles Petrie