jzhao.xyz

Search

Search IconIcon to open search

Transport Layer

Last updated Feb 26, 2022 Edit Source

Layer 2, the layer below the Application Layer and layer above the Network Layer

  1. Unit: Segment
  2. Responsibilities: Ensures data arrives in order (if required), Recovers lost data (if required), Identifies process on machine, flow control
  3. Adds an additional addressing space at the port level (historically a 16 bit uint from 0 to 65535)
  4. Can be either be either packet or stream based
    1. Packet - best effort, no established connection, no transport level delay/waiting (e.g. video, games, etc.)
    2. Stream - pipe model, established connection, flow/congestion control, possible delays (e.g. HTTP, email, etc.)