However, Most of the time with broadband internet your upload speed shouldn't cause enormous issues, and the true culprit is the routers between your router and the server having their own bandwidth limits or processing too many requests. If your upload speed is incredibly low, and the data your computer is sending is substantial, lag could be caused by low upload speed as it has to wait to send the rest of the information before the server will be able to convert the packets into usable data and send it's response. Your upload and download speeds are limits set by the cable company on your modem on how many data packets per second it is allowed to send to the network. When a packet leaves your computer it goes to your router (or your modem) and is sent to your Internet service provider's router, and then is sent to another of their routers, and another and another until it gets to the server's internet service provider's router and eventually after travelling through their router network it goes to the server.Įach one of these Hops takes a variable amount of time. Upload speed refers to how quickly your connection can send something (data, in this case) from your device to the wider internet. To transmit data over a network a computer uses a protocol (Usually TCP/IP) to give it a blue print of how to build a set of data packets that includes the source address, and the destination address and some other information like how many packets make up the whole package and what order the data inside the packets need to be read. In order to better understand your internet speed test, it is vital to know the difference between upload speed and download speed. Other times it's caused by the processing power of the routers between you and the server. Sometimes it's caused by processing power of either your machine, or the server. Lag (Latency) is caused by several different things.
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