4 ms·
1000 miles in a vacuum is 5.36 ms. Don't forget that it's up and back two times so you're looking at just over 21 ms waiting on light. The packet actually needs
by pathseeker 9y ago
1000 miles in a vacuum is 5.36 ms. Don't forget that it's up and back two times so you're looking at just over 21 ms waiting on light. The packet actually needs to go onto the Internet at that point too.
- dredmorbius 9y agoSure, though 20 ms getting you to a fat node is pretty good, especially if you're in an underserved area. The net time cost is actually the difference between this and straight-line overland distance, which is both not in vacuum and hits node latency. 10 ms is roughly datacenter lag (or was a few years back). 100ms is good cross-country pings, 300-600 is continent-to-continent links. Figure on edge caching aas well.
- chadgeidel 9y agoHaving lived in a "remote" (read not actually remote but not served by any ISP) area nearly anything would have been better than dial-up. Way back in the day (10-15 years ago) my friend with satellite Internet had 300+ ms pings everywhere and at the time a dial-up modem was still required. Good to know things have changed.