Client To Client Protocol
Also found in: Acronyms.
Client To Client Protocol(networking)
(CTCP) A type of protocol created to allow structured data such as font information to be exchanged between users on IRC. It is also used to send a query to a user. The available CTCP commands include VERSION, FINGER, DCC CHAT, DCC SEND, TIME, PING, ECHO, CLIENTINFO. Some commands are not available on some IRC client software.