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Second, the IRC client receives packets of data from the server and sorts through them to determine what they mean and needs to be done with them (such as creating a channel window, displaying a message in a channel window, telling you who is joining or leaving a channel, displaying private messages, etc.)IRC is based on a line-based structure with the client sending single-line messages to the server, receiving replies to those messages and receiving copies of some messages sent by other clients.
In most clients users can enter commands by prefixing them with /; depending on the command, these may either be passed directly to the server (generally used for commands the client does not recognize), passed to the server with some modification or handled entirely by the client.
Some servers are "leafs" and have no servers connected to them, while others are "hubs" and have several leafs (and other hubs) connected to them.
IRC servers run a UNIX-based program called "ircd" which allows them to send messages to each other.
There are thousands of running IRC networks in the world.
They run various implementations of IRC servers, and are administered by various groups of IRC operators, but the protocol exposed to IRC users is very similar, and all IRC networks can be accessed by the same client software.
Your access to the NCBI website at gov has been temporarily blocked due to a possible misuse/abuse situation involving your site.
This is not an indication of a security issue such as a virus or attack.
IRC gained prominence when it was used to report on the Soviet coup attempt of 1991 throughout a media blackout.
Keeping Your Personal Information Private Interacting with People Offline Being Aware of Predators Ceasing Communication and Reporting Threats Community Q&A Chatrooms are a fun place to engage in discussion about a variety of topics.
While most people who frequent online chatrooms are good people, there are some who are there to prey on or bully other people.
IRC Attacks Because IRC connections are usually unencrypted and typically span long time periods, they are an attractive target for malicious hackers.
Because of this, careful security policy is necessary to ensure that an IRC network is not susceptible to an attack such as an IRC takeover war.