This article briefly tells you about the 4th Layer in the OSI (Open Systems Interconnection) Model, the Transport Layer.
What is Transport Layer in the OSI Model?
Transport Layer is the Fourth layer in the OSI model
What is the Function of the Transport Layer – 4th Layer in OSI Model?
The transport layer takes services from the Application layer and provides services to the Network layer. The main role of the Transport layer is to provide the communication services directly to the application processes running on different hosts. We can also say that the main duty of Transport layer is to provide process to process communication.
Transport Layer is responsible for delivery of message to appropriate process. Transport Layer uses a Port Number to deliver the segmented data to the correct process amongst the multiple processes that are running on a particular host.
What is the Unit of Data Encapsulation in Transport Layer?
The Unit of Data Encapsulation in the Transport Layer is a Segment.
What are the Protocols used at Transport Layer?
The two most important protocols in the Transport Layer are Transmission Control Protocol (TCP) and User Datagram Protocol (UDP).
Want to read more about the Transport Layer?
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