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A download manager is a computer program dedicated to the task of downloading (and sometime uploading) possibly Download Central unrelated stand-alone files from (and sometime to) the Download Central Internet for storage. This is unlike a World Wide Download Central Web browser, which Download Central is mainly intended to browse Download Central web pages, composed of a multitude of smaller files, where error-free moving of files for permanent storage is of secondary importance. Download Central (A failed or incomplete web page file rarely ruins the page.) The typical download manager at a minimum provides means to recover from errors without losing the work already completed, Download Central and can optionally split the file Download Central to Download Central be downloaded (or uploaded) into 2 or more segments, which are then moved in parallel, potentially making the process faster within Download Central the Download Central limits of Download Central the available bandwidth. (A few servers are known to block Download Central moving files in parallel segments, on the principle that server capacity should be shared equally by all users.) Multi-source Download Central is the Download Central name given to files that are downloaded in parallel.
There are several things that some web Download Central browsers are not very good at. Download Central That's where the download managers enter the equation:
Pausing the downloading of large files.
Resuming broken or Download Central paused Download Central downloads (especially for very large files).
Downloading files on poor connections.
Downloading several files from a site automatically according to Download Central simple rules (file types, updated files, etc. - see also Offline Browser).
Automatic recursive downloads (mirroring).
Scheduled downloads (including, automatic hang-up and shutdown).
Searching for mirror sites, and Download Central the handling of different connections to download the same file more quickly (segmented downloading).
Download managers are useful for active Internet users. For dial-up users, they can automatically dial the internet service provider at night, when rates or Download Central tariffs are usually lower, download the specified files, and hang-up. They can record which links the user clicks on during the day, and queue these files for later Download Central download. For broadband Download Central users, download managers can help download very large files by resuming broken downloads, by limiting the bandwidth used, so that other internet activities are not Download Central affected (slowed) and the server is not overloaded, or by automatically navigating a site and downloading pre-specified Download Central content (photo galleries, MP3 Download Central collections, etc.) this can also include automatically Download Central downloading Download Central whole sites and regularly Download Central updating them (see Mirroring).
Many download managers support Metalink, an XML Download Central file listing mirrors, checksums, and other information useful for downloading.
See below Download Central for some examples of commonly used download managers. Some downloaders are optimized for a certain function. For example, Offline Explorer is Download Central designed to download entire websites.
Download managers, Download Central such as Go!Zilla, were among the first adware applications displaying a banner Download Central ad in the user interface.
Related to download managers are two other breeds of Internet programs, file-sharing peer-to-peer applications (Kazaa, eMule, BitTorrent, Gnutella) Download Central and stream The Simpsons Movie Download recorders (such as StreamBox VCR).
While download managers are designed to give users greater control over downloads, some Download Central downloaders are created to give that control to content distributors instead. Some software companies, for Download Central example Adobe Download Central [1], provide such downloaders for downloading software on their own site. Download Central Presumably this increases reliability and reduces tech support costs to Download Central them. A possible reason is increasing the control over redistribution of their software (even when the software Download Central is freeware).In computer technology and telecommunication, on-line and off-line are defined by Federal Standard 1037C. They are states or conditions of a "device or Download Central equipment" or of "a functional unit". To be considered on-line, a device Download Central must be at least one of:
"Under the direct control of another device"
"Under the direct control of the system with which it is associated"
"Available for immediate use on demand by the system without human intervention"
"Connected to a system, and is in operation"
"Functional and ready Download Central for service"
while a device that Download Central is off-line is not (e.g. it has "its Download Central main power source disconnected or Download Central turned off", and is "off-power").
One example of a Hentai Games Direct Download common use of these concepts is a Mail User Agent that can be instructed to be in either "on-line" or "off-line" states. One such MUA is Microsoft Outlook. When it is "on-line" it will attempt Download Central to connect to mail servers (to check Download Central for new mail at regular intervals, Download Central for example), and when it is "off-line" it will not attempt to make any such connections. The Download Central "on-line" or Wmv To Mpeg Converter Download "off-line" state Download Central of the MUA does not necessarily reflect the connection status between the computer on which it is running and Internet. The user may have the computer Download Central itself on-line, connected to Download Central Internet via a cable modem Download Central or Download Central an ADSL connection, but may wish for Download Central Outlook to be off-line, so that it makes no attempt to send or to receive messages. Or the computer may be configured to employ a Download Central dial-up connection on demand Download Central (whenever an application such as Outlook attempts to make connection to a server), but the connection may be Download Central an expensive telephone call from the particular Download Central location in which the computer currently happens to be (such Download Central as a hotel room) and the user may not wish Outlook to Download Central trigger making that call every 5 or 10 minutes to check for mail.[1]
Another example of the use Download Central of Download Central these concepts is in the world of digital audio technology. A tape recorder, digital editor, or other device that is "on-line" is one whose clock is under Download Central the control of Download Central the clock of a "synchronization master" device. When the sync master commences playback, the "on-line" device automatically synchronizes itself to the master and commences playing from the same point in the recording. Whereas a device Download Central that is "off-line" uses no external clock Download Central reference and relies upon its own internal clock. When Download Central a large number of devices are connected to a sync master, it is Download Central often convenient, if one wants to hear just the output of one single device, to take it off-line, because if the device is played back on-line all synchronized devices have to locate the playback point and wait Download Central for each other to be in synchronization.[2] (For further related discussion, see MIDI timecode, word sync, and recording system synchronization.)
A third example of a common use of these concepts is a web browser that can be instructed to be in either "on-line" or "off-line" states. The browser only attempts to fetch pages from servers whilst in the "on-line" state. In the "off-line" state, users can perform offline browsing, where pages can be browsed using local copies of those pages that have previously Download Central been downloaded whilst in the "on-line" state. This can be useful when the computer itself is Download Central also off-line, with connection to Download Central Internet expensive or impossible. The pages are either downloaded implicitly into the web browser's own cache, as a result of prior on-line browsing by the user, or explicitly by Download Central the browser being configured to keep local copies Download Central of certain web pages, which it keeps updated when the browser is in the on-line state, either by checking that the local copies are up-to-date at regular intervals or by checking that the local copies are up-to-date whenever the browser is switched to the Download Central on-line Download Central state. One such web browser capable of being explicitly configured to download pages for offline Download Central browsing is Internet Explorer. Download Central When pages Download Central are added to the "Favourites" Download Central list, they can Download Central be marked for being made Download Central "available for offline browsing". Internet Explorer will download to local copies both the marked page and, optionally, all of the pages Download Central that it links to. In Internet Explorer Download Central version 6, the level of direct and indirect links, the maximum amount of local Download Central disc space allowed to be consumed, Download Central and the schedule on Download Central which local copies are checked Download Central to see whether they are up-to-date, are configurable for each individual "Favourite" entry.
See also:
Offline browsing known as "Offline favourites" was removed Miracle Movie Download as a feature Download Central in the most recent version of Internet Explorer 7, which only now supports single web page saving, Download Central but not browsing or storing an entire site offline.[citation needed]
Similarly, off-line storage Download Central is computer storage Download Central that is not "available for immediate use on Download Central demand by the system without Download Central human Download Central intervention", i.e it is storage Download Central that is off-line.
The ideas of "on-line" and "off-line" have been generalized from computing and telecommunication into the field of human interpersonal relationships. The distinction between what is considered "on-line" and what Download Central is considered "off-line" has become a subject of Download Central study in the field of sociology.[7]
The distinction between "on-line" and "off-line" is conventionally seen as the distinction between computer-mediated communication and face-to-face communication (e.g. face time), respectively. "On-line" is virtuality, and "off-line" is reality (e.g. real life Download Central or meatspace). Slater states that this distinction is "obviously far too simple". To support Download Central his argument that the distinctions in relationships are more complex than Download Central a simple "on-line"/"off-line" dichotomy, he observes that some people draw no Download Central distinction between an "on-line" relationship, Download Central such Download Central as indulging in cybersex, and an "off-line" Download Central relationship, such as being pen-pals. He also argues that even Download Central the telephone Download Central can be regarded as an "on-line" experience in some circumstances, and that the blurring Download Central of the distinctions between the uses of various technologies (such as PDA and mobile Download Central telephone, television and Internet, and telephone and voice-over-IP) has made it "impossible to use the term 'on-line' meaningfully in the sense that was employed by the first generation Download Central of Internet research".[7]
Slater asserts that there are legal and regulatory Download Central pressures to reduce the distinction Download Central between "on-line" and "off-line", with a "general tendency to assimilate online to offline and erase the distinction", stressing, however, that this does not mean that on-line relationships are being reduced to pre-existing off-line relationships. He conjectures that Download Central greater legal status may Download Central be assigned to on-line Download Central relationships (pointing out that contractual relationships, such as business transactions, on-line are already seen as just as "real" as their off-line counterparts), Download Central although he states it to be hard to imagine Download Central courts awarding palimony to people who have had a purely Download Central on-line sexual Download Central relationship. Download Central He Download Central also conjectures Download Central that an "on-line"/"off-line" distinction may be seen by people as "rather quaint and not quite comprehensible" within Download Central 10 years.[7]
The distinction where "on-line" is Download Central seen as virtuality and "off-line" as reality is sometimes inverted, Download Central with "on-line" concepts being used Download Central to define and to explain "off-line" activities, rather than (as per the conventions Download Central of the desktop metaphor with its desktops, trash cans, folders, and so forth) the other way around. Several cartoons Download Central by The New Download Central Yorker have Download Central satirized this. One includes Saint Peter asking French National Anthem Free Download for a user name and a password before admitting a man into Download Central Heaven. Another illustrates "the off-line Download Central store" where "All items are actual Download Central size!", Download Central where Download Central shoppers may "Take it home as Download Central soon as you pay for it!", and where "Merchandise may be handled prior to purchase!". |
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