Now, we can specify from which byte, the byte stream to be returned from the server should start. How are files downloaded in parts? Now that IDM knows that the server allows multiple connections, it makes requests to the server for the file that it wants to download and the server returns a byte stream. If yes, it can download in parts otherwise it downloads the file linearly and at the same time the download can’t be paused. This can be checked using the ‘accept-ranges’ header in the server response and then subsequently using the ‘Range’ header in the GET request to the server. IDM first checks whether multiple connections to the file can be made or not. Most of the servers allow more than one connection to a Single File Stream from any client IP address requesting the file.
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