On Tue, Feb 13, 2007 at 09:19:16PM +0000, Matthew Toseland wrote: > What's the typical packet loss on a wired internet connection? I've > hardly ever seen packet loss here, certainly no more than 2%. > > On a good wireless connection? (20dB etc)? > > On a not so good wireless connection?
Some replies from Frost: ----- Fritz at iG_C1FGnra7KPLmiMUdsNZEjlLA ----- 2007.02.14 - 15:16:24GMT ----- That is certainly very difficult to answer. Especially on wireless networks. 802.11 uses link layer acks and retransmit. So in theory on a good wireless link without congestion you won't see more packet loss as on wired connections (=very view). Of course practice is as always different ;-) But because above fact packet loss heavily depends on how much data you are going to send. If the driver has time to do 13 retransmits for a packet you hardly would see any packet loss on the transport layer. But if the application sends a lot of data, the driver may decide to just drop packets after maybe a 2nd retransmit or something. However 2% packet loss is already a lot. If you create a artificial link which drops two out of 100 packets regardless of congestion this will seriously hurt TCP so much that you don't want to even view a Website over this link. Why do you ask? Implementing congestion control for FNP? ----- Anonymous ----- 2007.02.14 - 21:18:24GMT ----- On not so good wireless, 1km from access point (parabolic antenna) is ~2-5% in my case. but sometimes it's up to 20% (using different AP within 1km range). It depends also on weather and transfer rate. (ping to AP-router is 2000-5000ms) -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 189 bytes Desc: Digital signature URL: <https://emu.freenetproject.org/pipermail/devl/attachments/20070215/43cda775/attachment.pgp>
