Computer networks notes
TCP Sequence & Acknowledgement Numbers
The counters that make delivery reliable and in-order. Every section is a drawn page beside a clear written explanation, about 9 minutes in all.
- Chapter 16 of 31
- About 9 minutes
- 7 sections
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In this chapter
- Two counters
- Where the numbers start (ISN)
- SEQ counts bytes, not packets
- ACK = next byte expected
- Numbers in the handshake
- Lost segment → retransmit
- Cumulative acknowledgement
Next chapters
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