Flow control
07The advertised window limits how far the sender may send beyond acknowledged data, protecting the receiving endpoint.
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 3.8.6 ↗
RFC 9293 · § 3.8.6EXAMPLE
4 / 4
04
Allow transmission to resume.
The next window report tells the sender that space is available.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
A zero window pauses ordinary new data.
- The advertised window represents the sequence range the receiver is prepared to accept.
- Zero-window probing must be supported so a lost reopening update cannot deadlock the connection.
- Resource-management policy can still reclaim a stalled connection.
Flow control protects receiver capacity. Congestion control separately limits pressure on the network.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
Privacy