TCP Sequence Numbers

• TCP header has a 32-bit sequence number field

Source Port # (16)

Destination Port # (16)

Sequence Number (32 bits)

Acknowledgement Number (32 bits)

Hdr Len

(4)

Flags (6)

Window Size (16)

Options (if any)

PAD

Reserved (6)

TCP Checksum (16)

Urgent Pointer (16)

Data Field

Previous slide

Next slide

Back to first slide

View graphic version