on Tue, Aug 07, 2001 at 12:00:39AM -0500, Petr [Dingo] Dvorak (dingo@texoma.net) wrote: > On Tue, 7 Aug 2001, Ian Perry wrote: > > IP> Hey Dingo, > IP> > IP> I had a one way sat link here for a while.... > IP> It ran a Hughes card in it.... > IP> I tried to get it up under Debian but noone supported it. > IP> I ended up running it under 98. > IP> Finally after much trouble, we took it off line and went back to ISDN > IP> > IP> Hope you have better luck. > with browsing web pages this is really not much of a issue, most of > them should fit well within the alloted burst of data, but it could be > problem with remote shells and other things that send/receive alot of > small packets. An issue you're neglecting to consider is latency. Geosynchronous satellites are at 23,000 miles. Single-hop links involve a round-trip of 46,000 miles. That's a quarter of a light-second. Meaning, it's going to take quarter second to get from one end of the link to the other. This means that every send/receive packet transaction takes one half second. For some protocols (e.g.: FTP), there are a slew of such transactions that take place, including DNS resolution, host contact, login, command stream, and data stream. That's at least 2.5 seconds to start downloading data. HTTP has less of a connection overhead, but you're still looking at considerable latency for every connection made. This is less an issue with bulk data transfers, but it will play hell with your netreck game, and forget Internet telephony. The PBS Cringely has a note on how he swapped out his satellite service for 802.11b service, over an eight mile line-of-site link to a neighbor who was within telco limits for DSL service. A large motivator was satellite latency. Makes for interesting reading. -- Karsten M. Self <kmself@ix.netcom.com> http://kmself.home.netcom.com/ What part of "Gestalt" don't you understand? There is no K5 cabal http://gestalt-system.sourceforge.net/ http://www.kuro5hin.org Free Dmitry! Boycott Adobe! Repeal the DMCA! http://www.freesklyarov.org Geek for Hire http://kmself.home.netcom.com/resume.html
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