10 KiB
| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| TCP slow start - Glossary | MDN | 1/3 | https://developer.mozilla.org/en-US/docs/Glossary/TCP_slow_start | reference | web, html, css, javascript, documentation | 2026-05-05T05:46:42.707428+00:00 | kb-cron |
MDN HTML HTML: Markup language
HTML reference
HTML guides
Markup languages
CSS reference
CSS guides
Layout cookbook
JavaScriptJS JavaScript: Scripting language
JS reference
JS guides
Web APIs Web APIs: Programming interfaces
Web API reference
Web API guides
- Using the Web animation API
- Using the Fetch API
- Working with the History API
- Using the Web speech API
- Using web workers
Technologies
Topics
Learn Learn web development
Frontend developer course
- Getting started modules
- Core modules
- MDN Curriculum
- Check out the video course from Scrimba, our partner
Learn HTML
Learn CSS
Learn JavaScript
Tools Discover our tools
About Get to know MDN better
TCP slow start
TCP slow start is an algorithm that helps discover the available network bandwidth for packet transfer, and balance transmission speed according to the network's capabilities. The mechanism rapidly increases the volume of information sent from a very low level to a threshold level. If congestion is detected the threshold is reset to a much reduced level and the slow start process starts again. This prevents congestion when a network's capabilities are unknown or exceeded — at the beginning of a connection, after a period of inactivity, or after detecting congestion — without itself causing congestion. Network congestion occurs when more data is sent than the network is able to transfer between nodes at any given time. When a network is congested, machines on the network experience degraded quality of service, including slow data transfers and dropped packets. The slow start algorithm is a major part of TCP congestion control, as it ensures that new connections progressively increase data rates and that those rates don't overwhelm other nodes.