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  • How does IDM speed up downloads?

    jigneshdgreat

    Member

    Updated: Oct 26, 2024
    Views: 1.5K
    If IDM can speed up downloads , why don't web browsers use the same technology for downloading?
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Replies

  • Ankita Katdare

    Administrator • Feb 27, 2012

    They are many tutorials around regarding integration of IDMs with our browsers (Firefox, Chrome or IE).

    Since we have add-ons available to do this, our task is accomplished.
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  • jigneshdgreat

    Member • Feb 27, 2012

    AbraKaDabra
    They are many tutorials around regarding integration of IDMs with our browsers (Firefox, Chrome or IE).

    Since we have add-ons available to do this, our task is accomplished.
    but how does idm actually speed up downloads
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  • Ankita Katdare

    Administrator • Feb 27, 2012

    jigneshdgreat
    but how does idm actually speed up downloads
    Oh. What IDM does is, it divides downloads into multiple streams, uses auto/manual update of download address and does things like listing recent downloads and supports multiple queues for easy access to files.
    It can search for mirrors (On the Internet, a mirror site is an exact copy of another Internet site.)
    So, IDM speeds up the downloads.
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  • Atul Thapliyal

    Member • Mar 14, 2012

    distribution into no of connections doesn't matter much, as supported by mediafire and other sites, as I have experienced the same download speeds even with single connection like on megaupload.
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  • coolboy.napster

    Member • Mar 15, 2012

    Internet download manager IDM is software which tracks the download address and then breaks it into small chuncks of address which can be downloaded individually.
    In layman's language instead of one download it makes into many parts. .Thus making parallel or simultaneous download. .The upload for the each chunck simultaneously makes the server to act fast and concentrate on idm download other than any thing else. . .
    You could see the result as it makes the sever very busy. .during the download time you face minimum browsing speed! !
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  • Kaustubh Katdare

    Administrator • Mar 15, 2012

    Isn't it true that the IDMs search for the other versions of the file on the Internet and then download chunks. I'm not sure how'd dividing the same file would help in creased download speed.

    PS: Or is it just an illusion that IDMs speed up the download? Ultimately; the download speed is going to be determined by the client's Internet connection speed.
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  • Atul Thapliyal

    Member • Mar 15, 2012

    exactly my point.. divide the file into parts and bandwidth will divide as well... and will sum up to give the same dedicated bandwidth..
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  • greatcoder

    Member • Mar 15, 2012

    #-Link-Snipped-#
    #-Link-Snipped-#
    Before understanding IDM, we should try to understand some very basic things:
    1) When we discuss about downloading through web, Application layer protocol is HTTP and transport layer protocol is TCP.
    2) TCP follows a complex set of many algorithms and provide different service to the application layer:
    in order delivery of packets, Flow Control, Congestion Control etc.
    3) Now a TCP connection limits its sending rate to support Congestion Control and Flow control Mechanisms.
    4) What IDM does : It divides the file to be downloaded into multiple segments and downloads each segment thru a separate TCP connection instead of going for a single TCP stream.
    5) Now each TCP connection has its own individual buffers and works independently of other simultaneous connections.
    6) each individual TCP connection now tries to utilize the unused Bandwidth to the maximum and thus overall speed of download increases multifolds.

    Hope this helps
    Regards
    GC
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  • Atul Thapliyal

    Member • Mar 16, 2012

    so if i start two separate downloads even on mozilla then combined speed should give me equal to what IDM will give from a single site? and how can a site allow more than one connection from a single client?
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  • greatcoder

    Member • Mar 16, 2012

    Atul Thapliyal
    so if i start two separate downloads even on mozilla then combined speed should give me equal to what IDM will give from a single site? and how can a site allow more than one connection from a single client?
    A site can allow more than one connection from a single client because at the TCP layer four parameters can differentiate a user: Src IP, Dest IP, SRC port , Dest PORT. IDM uses different port numbers for each TCP connections.
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  • avii

    Member • Mar 16, 2012

    I get same speeds, with IDM or in browser.
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  • Atul Thapliyal

    Member • Mar 16, 2012

    only source port will differentiate between two connections from the same user. what i think is that TCP can never be a bottleneck for increased transfer rate. even at restricted rates, the transfer rate between adjacent layers would be much faster as compared to n/w bandwidth. also one application layer handling these many connections would become difficult
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  • avii

    Member • Mar 16, 2012

    Guys, speed depends on your ISP & not by IDM. My max speed is 120 KB/s but sometimes IDM shows 125 - 130 KB/s LOL 😁
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  • Atul Thapliyal

    Member • Mar 16, 2012

    maximum would be 128 so IDM will show that much...
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  • greatcoder

    Member • Mar 16, 2012

    avii
    Guys, speed depends on your ISP & not by IDM. My max speed is 120 KB/s but sometimes IDM shows 125 - 130 KB/s LOL 😁
    That is perfectly all right... Of course our download speed will definitley be limited by the bandwidth of the link.
    But everytime browser doesnt utilize the maximum bandwidth available for download. IDM speeds up the download by using every possible badnwidth available to it by increasing the number of simultaneous TCP connections.👍
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