Comment:

Fielding wrote " Layered system constraints allow intermediariesproxies, gateways, and firewallsto be introduced at various points in the communication without changing the interfaces between components, thus allowing them to assist in communication translation or improve performance via large-scale, shared caching ...". Clearly his use of the term "intermediary" was as a (typically) transparent part of the network infrastructure, a conventional use of the term, not as a message-queue-like server. Suggest that the term "intermediary" be replaced with "Queue Server" or some other term.

Summary:

Change "intermediary" to "queue server" or some other term