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`0:0:0:0:0:0:0:0` is represented as `\:\:`
The second transport service is the connection-oriented service. On the Internet, this service is often called the `byte-stream service` as it creates a reliable byte stream between the two applications that are linked by a transport connection. Like the datagram service, the networked applications that use the byte-stream service are identified by the host on which they run and a port number. These hosts can be identified by an address or a name. The figure below illustrates two applications that are using the byte-stream service provided by the TCP protocol on IPv6 hosts. The byte stream service provided by TCP is reliable and bidirectional.