What's the difference between a download and an upload? These are basic terms that any web user should understand. They come into play when following some directions, troubleshooting network issues, choosing your internet speed, and more. Below, we'll go over what uploading and downloading means, as well as common peripheral terms and information that will help you have a firmer grasp of these common online processes.
When you upload something to a website, another user's computer, a network location, etc. Files can be uploaded to a server, such as a website, or directly to another device, like when using a file transfer utility. For example, if you upload an image to Facebook, you're sending the picture from your device to the Facebook website. The file started with you and ended up somewhere else, so it's considered an upload from your perspective.
This is true for any transfer like this, no matter the file type or where it's going. You can upload documents to your teacher via email, upload a video to YouTube, upload music to your online music collection, etc. You're taking data from elsewhere and putting it onto your device, essentially bringing it "down" from the internet. Downloading something from the web means that you're transferring data from the other location to your own device, whether it be your phone, computer, tablet, smartwatch, etc.
All sorts of information can be downloaded from the web: books, movies, software, etc. For example, you can download movies to your phone to watch while you're on the go, which means that the actual data that makes up the movie is transferred from the site you got it from and saved to your phone, making it locally available.
Considering that an upload is sending data, and a download is saving data, you might have caught on already that this goes on all the time when you use the web. Open your web browser and go to Google. Here's another example: when you browse YouTube for music videos, each search term you enter is sending tiny bits of data to the site to request the video you're looking for.
Each of those requests you send are uploads since they started on your device and ended up on YouTube's end. When the results are understood by YouTube and sent back to you as web pages, those pages are being downloaded to your device for you to see.
For a more concrete example, think about an email. You're uploading the pictures to an email server when you send someone photos over an email. If your goal is to determine which program is generating a large volume of traffic, it may make sense to use both in combination -- use Wireshark to determine what the traffic is, and what the local and remote ports are; then use TCPView to determine which local program is responsible.
As an aside, for folks on Linux: Also consider Sysdig. The curses interface, csysdig , specifically lets you look at which processes are sending network traffic. After installing the software , the process looks something like this:.
If you want to view the actual traffic being sent and received, select a connection and press F6 to dig into the syscalls sending and receiving traffic on that connection.
I don't find that anymore probably because i am using a version that's free. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How can I find out what's uploading traffic to the internet?
If you've ever opened an example document in one of our tutorials, you've downloaded that file. Usually, when you download a file you will start the download by clicking a link to that file. Many of our tutorials contain links to files, like this:. Download our practice document.
If you click the link, your browser should prompt you to select one of two methods for downloading the file. Either way, once you click OK, the download begins.
I have recently become aware that my PC is continuously uploading data to the net - On Saturday last it uploaded 4GB of data. It appears to me that it is some sort of system upload - probably to Microsoft. I have searched the web and found a number of people with the same or similar problems - none of there remedies have sorted my problem - short of reloading Windows.
I expect that something has gone wrong that requires fixing - but what is it? This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. Threats include any threat of suicide, violence, or harm to another.
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