World Library  
Flag as Inappropriate
Email this Article

Download manager

Article Id: WHEBN0000337532
Reproduction Date:

Title: Download manager  
Author: World Heritage Encyclopedia
Language: English
Subject: Xunlei, Internet suite, Arora (web browser), Background Intelligent Transfer Service, Stream recorder
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Download manager


A download manager is a computer program dedicated to the task of downloading (and sometimes uploading) possibly unrelated stand-alone files from (and sometimes to) the Internet for storage. Some download managers can also be used to accelerate download speeds by downloading from multiple sources at once. Although web browsers may have download managers incorporated as a feature, they are differentiated by the fact that they do not prioritize accurate, complete and unbroken downloads of information. While some download managers are fully fledged programs dedicated to downloading any information over one or more protocols (e.g. http), many are integrated into installers or update managers and used to download parts of a specific program (or set of programs), examples include Google and Adobe's update managers.

Adware

Download managers were among the first (this includes torrent clients as they are technically download managers as well) adware applications displaying a banner ad in the user interface.

Features

Most download managers come with a features like video and audio grabbing from popular sites like YouTube etc., They also support website grabbing. Queue processing is another important feature of download managers. They also have the ability to pause and resume downloads, and impose speed restrictions as well. This features come very useful in regions where power failures are frequent. Additionally, most of the commercial download managers can download following user planned schedules and download accordingly. A few download managers claim to increase the download speed by a factor of many times.

Download managers also have very tight integration with browsers. Mostly they do this by installing an extension to the user's browser.

Related applications

Related to download managers are two other breeds of Internet programs, file-sharing peer-to-peer applications (eMule, BitTorrent, Gnutella) and stream recorders (such as StreamBox VCR). While download managers are designed to give users greater control over downloads, some downloaders are created to give that control to content distributors instead. Some software companies, for example Adobe, provide such downloaders for downloading software on their own site. Presumably this increases reliability and reduces their technical support costs. A possible reason is increasing the control over redistribution of their software (even when the software is freeware).

Download acceleration

Download acceleration, also known, as multipart download, is a term for the method employed by software such as download managers to download a single file by splitting it in segments and using several simultaneous connections to download these segments from a single server.

The reason for doing so is to circumvent server side limitations of bandwidth per connection. Because in normal networking situations all individual connections are treated equally, rather than actual file transfers, multiple connections yields an advantage on saturated links over simple connections, both in terms of total bandwidth allocation and resilience. Many servers, however, implement a maximum number of simultaneous connections per client in order to mitigate this.

This is not to be confused with segmented downloading, which allows a client to download segments of a file simultaneously from multiple servers.

Comparison of download managers

See also


This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.