Asks <nickname> what irc client they're running.  Their IRC client may or may not show them that you've asked for this information.  ChatZilla currently does not.  If you do not specify <nickname>, ChatZilla will ask the server for the version of the IRCserver software it is running.
询问 <nickname> 正在运行什么 irc 客户端。他们的 IRC 客户可能会或可能不会向他们表明您已要求提供此信息。 ChatZilla 目前没有。如果您不指定 <nickname>，ChatZilla 将询问服务器它正在运行的 IRCserver 软件的版本。