Server to server = Server client to server?

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For a server to server connection, is the connecting server considered
as a client of the accepting server or is it not?

I have the following classes:

Connection <--- base class of the following two
ClientConnection <--- client
ServerConnection <--- server
ServerClientConnection <--- server as a client of another server.

But then I came across something that states "A client is anything
connected to a server that is not another client".

Comments please...

 

[jeak110]

Just remember! Server ( programm ) is always listening a connections!!!

 

[Alan Krueger]

For a server to server connection, is the connecting server considered
as a client of the accepting server or is it not? [...]
But then I came across something that states "A client is anything
connected to a server that is not another client".

A client connects to a listening server, a server listens for clients to
connect to it. Once a connection has been initiated, there's nothing
special about one side or the other: they're each one side of a
bi-directional stream.