OSI Model Transport Layer | Computer Networks Tutorial | Minigranth
Transport Layer : OSI
The Transport Layer
is the middle layer(4th Layer) of the
The Transport-Layer acts as the transition point between the functions performed
by Upper layers(Application Layer,
Presentation Layer, Session Layer) & Lower layers(Network Layer, Data Link Layer, Physical
This layer is
responsible for end to end data transmission service using connection
oriented or either through connection-less protocols.
Data received from
Upper layers application are combined into data streams and are transmitted
to the receivers end in exact format as it was in original.
Hiding of sensitive
details of data from networks and providing data transmission in a
transparent mode is also done by the transport layer itself.
Transport Layer :
Functions & Features
Segmentation : Large data is divided into
smaller segments at the senders end and then these smaller segments are
recombined in exact format before it is received at receivers
Error Control : Distortion, Un-delivery
of data packets and noise in data packets results in error and this is
prevented using Transport Layer too and this feature is called Error
Flow Control : Transport-Layer ensures
that faster data transmission and slow data absorption or slow data
transmission and faster data absorption must not occur.