An example of such a central webpage has been set up here . The central webpage lists efnet , ircnet , unet , dalnet , etc. Each listed feature then will be a link to a page with a detailed description. The effect of each option must be described in order to allow client coders to support it. A client is only incompatible with a network when it does not support a mandatory option.
Lets use the notation that aaa is mandatory when it is red .
The negotiation is considered finished as soon as the server sent its PROT SET message, starting with the next message the server sends. The client will switch to the new protocol directly after sending this message, starting with the next message it sends.