Tag Archives: Layer 4

The Transport Layer – Layer 4

The four main functions of the Transport layer are:

  • Segment and assemble upper-layer applications
  • Transport segments from one host to another host
  • Establish and manage end-to-end operations
  • Error recovery
  • The Transport Layer Layer 4 246x300 The Transport Layer   Layer 4In carrying out its duties, the Transport layer performs a range of support activities, including:

  • Maintaining data integrity through flow control techniques
  • Multiplexing the data from upper layer applications
  • Setting up and tearing down any virtual circuits established to transport the data over the network
  • Hiding any network-dependent information from the upper layers (which will only confuse them)
  • Breaking down Session layer (layer 5) datagrams into segments
  • Monitoring the error-free delivery of the data to its destination
  • Providing for general connection management and data transfer services
  • Providing for the reliable (but, not guaranteed) delivery of data
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    Tags: frame packet segment datagram, transport layer, frame packet segment, packets frames and segments