Control protocol, internet messages (IC's ) is one of the protocols, the main protocol packets of the internet. About the original use of it in operating systems computers connected to the network, to send error messages, for example, the service requested is not available or that a host or router is disabled. From the IC's can be used to relay off orders use also.

The IC's relies on IP to perform its tasks. and integral part of IP. This system with the transport systems, data like or Mississippi, or Yu, the wake is different and to send and receive data not used. This protocol typically, in applications the grid is not used, except in a few exceptions, such as ping or Tris trained.