TCP Segmentation

• Application data is broken into “segments” by TCP

• • TCP provides a byte-stream service

• The receiving application usually cannot tell the difference between

• • A write of 30 bytes followed by a write of 40 bytes
  • A write of 40 bytes followed by a write of 30 bytes

• Maximum size of TCP segments based on measured Path MTU

• • Typically 1460 bytes

• IP fragmentation of TCP packets is rare

• • But it can happen…