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Chapter 2
Protocol Attributes
Connection-Oriented Protocols
Connection-oriented protocols
are protocols that contain inherent functions
that control the connection as well as data transfer. These functions are very
detailed in the procedures that are followed to enable reliable and error-free
data transfer. When a source open system needs to transfer data to a desti-
nation open system, the connection-oriented protocols actually establish a
communication pipe. The
pipe
, as it is called here, is nothing more than a
logical connection between two open systems. A great deal of information is
used to establish this communication pipe, however.
In order to establish a connection, the two open systems must share cer-
tain information that allows them to negotiate terms and finally establish a
link. The information includes the common protocol that will be used,
required resources, and available resources. Look at Figure 2.3. This figure
shows the steps taken as communication is established between two open
systems when using TCP, a connection-oriented protocol.
F I G U R E 2 . 3
Link establishment and data transfer using a connection-oriented protocol
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