A telecommunications network is a collection of terminals, links and nodes which connect to enable telecommunication between users of the terminals.
Each terminal in the network must have a unique address so messages or connections can be routed to the correct recipients.
A large number of protocols have been developed over the years to specify how each different type of telecommunication network should handle the control and bearer messages to achieve this efficiently.
In general, every telecommunications network conceptually consists of three parts, or planes (so called because they can be thought of as being, and often are, separate overlay networks): The data network is used extensively throughout the world to connect individuals and organizations.
TCP/IP are the fundamental protocols that provide the control and routing of messages across the data network.
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