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MrMurMur
So I was a little bored and experimented on speedtest.net and found out that if I test it with a server near me (In this case in Germany) I get ~48 MBits down ~7.5 MBits up. Now if i try a different server, far away (I tried it with servers in the USA and Australia) I barely get 1 MBits down and 0.3 MBits up.
Why is this? Shouldn't the ping be the only thing that increases with distance?
I don't want to have better results, I want to understand why it is how it is.
Thanks in advance
Answer
It does. Naturally, because the distance is further, it takes longer for your computer to contact a far away server (higher ping, like you said). When you upload or download something, the information doesn't flow in a continuous stream, like water in a pipe. If that were the case, aside from the initial connection time, the data transfer rate would be unaffected. But it is not the case.
You've probably at least heard of "TCP/IP." TCP (transmission control protocol) describes how data is transferred between devices connected via IP (internet protocol). The important thing here is that a standard TCP connection only sends 64 kB of data at a time (on IPv4 at least). Your computer sends a request for data, that signal travels to the server, the server sends 64 kB of data, it travels to your computer. And this repeats. The server doesn't send the next 64 kB until your computer confirms the previous transfer was successful and asks for more. It's more like a game of ping pong than water coming out of your sink. Since your computer has to communicate back and forth with the server, you can see how it takes more time depending on distance. This is a little dated, but here's an experiment concerning this topic: http://blog.httpwatch.com/2008/08/14/the-surprising-effect-of-distance-on-download-speed/
I would suspect that connecting with a server across large distances can get a lot more complex. I imagine there's a lot more "transfers" involved considering the number of ways to get from A to B is limited. And that includes a higher chance of hitting a bottleneck. Here's a map of the underwater internet cables, which I'm half sharing just because it's awesome: http://submarine-cable-map-2013.telegeography.com
Anyways, here's a link I came across that lists more factors that might be involved:
http://www.wiredrive.com/knowledge-base/troubleshooting/factors-that-affect-uploading-and-downloading-speed/
It does. Naturally, because the distance is further, it takes longer for your computer to contact a far away server (higher ping, like you said). When you upload or download something, the information doesn't flow in a continuous stream, like water in a pipe. If that were the case, aside from the initial connection time, the data transfer rate would be unaffected. But it is not the case.
You've probably at least heard of "TCP/IP." TCP (transmission control protocol) describes how data is transferred between devices connected via IP (internet protocol). The important thing here is that a standard TCP connection only sends 64 kB of data at a time (on IPv4 at least). Your computer sends a request for data, that signal travels to the server, the server sends 64 kB of data, it travels to your computer. And this repeats. The server doesn't send the next 64 kB until your computer confirms the previous transfer was successful and asks for more. It's more like a game of ping pong than water coming out of your sink. Since your computer has to communicate back and forth with the server, you can see how it takes more time depending on distance. This is a little dated, but here's an experiment concerning this topic: http://blog.httpwatch.com/2008/08/14/the-surprising-effect-of-distance-on-download-speed/
I would suspect that connecting with a server across large distances can get a lot more complex. I imagine there's a lot more "transfers" involved considering the number of ways to get from A to B is limited. And that includes a higher chance of hitting a bottleneck. Here's a map of the underwater internet cables, which I'm half sharing just because it's awesome: http://submarine-cable-map-2013.telegeography.com
Anyways, here's a link I came across that lists more factors that might be involved:
http://www.wiredrive.com/knowledge-base/troubleshooting/factors-that-affect-uploading-and-downloading-speed/
Best internet provider (with wifi) australia 2013?
adrian ben
Im thinking about dodo. They have good deals like $40/month and unlimited internet free wifi modem etc. but i heard bad ratings and review for it. I also looked up at tpg. I heard some bad feedbacks and good ones. I have a vodafone pocket wifi now its pretty good but i only get 6 gbs per month. I need a lot of internet because i download a lot of stuffs and play online games on my playstation. Now that we're moving i need to know the best and cheap ones. My dad has telstra for his internet in his work shop. But i have no idea if its good or not. He has an old dsl modem and an old computer. It doesnt have wifi u still have to buy it. I really need a cheap one less than a $100 a month. And good for gaming. My parents are cheap and my mum is really influence by our family friend accountants that are really rich for just being cheap. Thanks
Answer
Telstra obviously the best, but iinet and TPG are also good all Australian ISPs. There is also Pacific Internet, parent company is Singaporean, but they have a base in Melbourne. I've been with them for nearly 15 years with no problems.
Telstra obviously the best, but iinet and TPG are also good all Australian ISPs. There is also Pacific Internet, parent company is Singaporean, but they have a base in Melbourne. I've been with them for nearly 15 years with no problems.
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