Multiplexing

• Other Messages have Analogous Fields

  • Identify contents of data field

• TCP and UDP

  • Have Port number fields
  • Identify the application process (80=HTTP)

Source Port # (16)

Destination Port # (16)

Sequence Number (32 bits)

Acknowledgement Number (32 bits)

Hdr Len

(4)

Flags (6)

Window Size (16)

Reserved (6)

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