A download manager is a computer program Video Grabber Download dedicated to the task of downloading (and Video Grabber Download sometime uploading) possibly unrelated stand-alone files from (and sometime to) the Internet for storage. This is unlike a World Wide Web browser, which is mainly Video Grabber Download intended to Video Grabber Download browse web pages, composed of a multitude of smaller files, where Video Grabber Download error-free moving of files for permanent storage Video Grabber Download is of Video Grabber Download secondary Video Grabber Download importance. (A failed or incomplete web page file rarely ruins Video Grabber Download the page.) The typical download manager at a minimum provides means to recover Video Grabber Download from errors without losing the work Video Grabber Download already completed, and can optionally split the file to be downloaded (or uploaded) into 2 Video Grabber Download or more segments, Video Grabber Download which Video Grabber Download are then moved in parallel, potentially making the process faster within the limits of the available bandwidth. (A few servers are known to Video Grabber Download block moving files in Video Grabber Download parallel segments, on Video Grabber Download the principle that server capacity should be shared equally by all users.) Multi-source is the name given to files that are downloaded in parallel.
There are several things that some web browsers are not Video Grabber Download very good at. That's where the download managers Video Grabber Download enter the equation:
Pausing Video Grabber Download the downloading of large files.
Resuming broken Video Grabber Download or paused downloads (especially for very large files).
Downloading files on poor Video Grabber Download connections.
Downloading several files from a site Video Grabber Download automatically according to simple rules (file types, Video Grabber Download updated files, etc. - see also Offline Browser).
Automatic recursive downloads (mirroring).
Scheduled downloads (including, automatic hang-up and shutdown).
Searching Video Grabber Download for mirror sites, and the handling of different connections to download the same file more quickly (segmented downloading).
Download managers are useful for active Internet Video Grabber Download users. For dial-up users, they can automatically dial the internet service provider at night, when rates or tariffs are usually lower, download the specified files, and hang-up. They can record which links the Video Grabber Download user clicks on during the day, and queue these files for later download. For broadband users, download managers Video Grabber Download can help download very large files Video Grabber Download by resuming broken downloads, by limiting the bandwidth used, so that other internet activities are not affected (slowed) and the server is not overloaded, or by automatically navigating a site Video Grabber Download and downloading pre-specified content (photo galleries, MP3 collections, Video Grabber Download etc.) this can also include automatically downloading Video Grabber Download whole Video Grabber Download sites Video Grabber Download and regularly Video Grabber Download updating them (see Mirroring).
Many download managers support Metalink, an XML file listing mirrors, checksums, and other information useful for downloading.
See Bosanske Muzke Download below 25th Wedding Songs Free Download for some examples of commonly used download managers. Some downloaders are optimized for a Video Grabber Download certain function. For Video Grabber Download example, Video Grabber Download Offline Explorer is designed to download entire Video Grabber Download websites.
Download Radio Ga-ga Download managers, Video Grabber Download such as Go!Zilla, were among Video Grabber Download the first adware applications Video Grabber Download displaying a banner ad in Video Grabber Download the Video Grabber Download user interface.
Related Aben Free Movie Download To Own to download managers are two other breeds of Internet programs, file-sharing peer-to-peer applications (Kazaa, 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. Video Grabber Download Some Video Grabber Download software companies, Naxjp Download for example Video Grabber Download Adobe [1], provide such downloaders for downloading software on their own Video Grabber Download site. Presumably this increases reliability and reduces tech support costs to them. A possible reason is increasing the Video Grabber Download control over redistribution of their software (even when the software is freeware).In computer technology and telecommunication, on-line and off-line Video Grabber Download are defined Video Grabber Download by Federal Standard Video Grabber Download 1037C. They are states or conditions of a Video Grabber Download "device or equipment" or of "a functional unit". To be considered on-line, a device must be at least one of:
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"Under the direct control of another device"
"Under the direct control of the system with which it is Video Grabber Download associated"
"Available for immediate use on demand by the system without human intervention"
"Connected to a system, Video Grabber Download and is in operation"
"Functional Video Grabber Download and ready for service"
while Video Grabber Download a device that is off-line is not (e.g. it has "its main power source disconnected or turned off", and is "off-power").
One example of a common Video Grabber Download 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 Video Grabber Download Outlook. When Video Grabber Download it Download Chakde India is "on-line" it will attempt to connect to mail servers (to Video Grabber Download check for new mail at regular intervals, for Nod 32-free Download example), Video Grabber Download and Video Grabber Download when it is "off-line" it Video Grabber Download will not attempt to make any such connections. The "on-line" or "off-line" state of the MUA does not necessarily reflect the connection status between the computer on which Video Grabber Download it is running Video Grabber Download and Internet. The user may have Lords Of Magic Free Download the computer Video Grabber Download itself on-line, connected to Internet via a cable Video Grabber Download modem or an ADSL connection, but may wish Video Grabber Download for Video Grabber Download Outlook to be Video Grabber Download off-line, so that it makes no attempt to send or to receive messages. Or the computer may be configured to employ a dial-up connection on demand (whenever an application such as Outlook attempts to make connection to a server), but the connection may be an expensive telephone call from the particular location in which the computer currently happens to be (such as a hotel room) and the user may not wish Outlook Video Grabber Download to trigger making that call every 5 or 10 minutes Video Grabber Download to check for mail.[1]
Another example of the Video Grabber Download use of these concepts is in the world of digital audio technology. A tape recorder, digital editor, or other device that is "on-line" is Video Grabber Download one whose clock is under the Video Grabber Download control of the clock of a "synchronization master" device. When the sync master commences playback, the "on-line" device automatically synchronizes itself to the master Video Grabber Download and commences Video Grabber Download playing from the same Video Grabber Download point in the recording. Whereas a device that is "off-line" uses Video Grabber Download no external clock reference and relies upon its own internal clock. When a large number of devices are connected Video Grabber Download to a sync master, it is often convenient, Video Grabber Download if one wants to hear just the output of Video Grabber Download one single Video Grabber Download device, to take it off-line, because if the Video Grabber Download device is played back on-line all synchronized devices have to locate the playback point and wait for Video Grabber Download each other to be in synchronization.[2] Video Grabber Download (For further related discussion, see MIDI timecode, word sync, and Video Grabber Download 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. Video Grabber Download The browser only attempts to fetch pages from servers whilst in the "on-line" Video Grabber Download 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 been downloaded whilst in the "on-line" Video Grabber Download state. This can Video Grabber Download be useful when the computer itself is also off-line, with connection Video Grabber Download to Internet expensive or impossible. The pages are either downloaded implicitly into the web Video Grabber Download browser's own Video Grabber Download cache, Video Grabber Download as a result of prior on-line browsing by the user, or Video Grabber Download explicitly by the Video Grabber Download browser being configured to keep local copies of certain web pages, which it keeps updated when the browser is in Video Grabber Download the on-line state, either by checking that the local copies are up-to-date at regular intervals or by checking Video Grabber Download that the local copies are up-to-date whenever the browser is switched to the on-line state. One such web browser capable of being explicitly configured to download pages for offline browsing is Internet Explorer. When pages are added to the "Favourites" list, they can be marked for being made "available for offline browsing". Internet Explorer will download to local copies both the marked Video Grabber Download page Video Grabber Download and, optionally, all of the pages Video Grabber Download that it links to. In Internet Explorer version 6, the level of direct and indirect links, the maximum amount of local disc Video Grabber Download space allowed to be consumed, and the schedule on which local copies are checked to see whether they are up-to-date, Video Grabber Download are configurable for each individual "Favourite" entry.
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See also:
Offline browsing known as "Offline favourites" was removed as a feature in the most Video Grabber Download recent version of Internet Explorer 7, which only now supports single web page Video Grabber Download saving, but not browsing or storing Video Grabber Download an entire site offline.[citation Video Grabber Download needed]
Similarly, off-line Video Grabber Download storage is computer Video Grabber Download storage that is not "available for immediate use on demand by the system without human intervention", i.e it is storage that is off-line.
The Video Grabber Download 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 is considered "off-line" has Video Grabber Download become a subject of 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 Video Grabber Download and face-to-face communication (e.g. face time), respectively. "On-line" is virtuality, and "off-line" is reality (e.g. real Video Grabber Download life or meatspace). Slater states that this distinction is "obviously Video Grabber Download far too simple". To support his argument that the Video Grabber Download distinctions in relationships are more complex than a simple "on-line"/"off-line" dichotomy, he observes that some people draw no distinction between an "on-line" relationship, such as indulging in cybersex, and an "off-line" relationship, Video Grabber Download such as being Video Grabber Download pen-pals. He also argues that even the telephone can be regarded as an "on-line" experience Video Grabber Download in some circumstances, and that the Download Free Otis Redding Music blurring of the distinctions between the uses of various technologies (such as PDA and mobile telephone, Video Grabber Download television and Internet, and telephone and voice-over-IP) has made it "impossible to use the term Video Grabber Download 'on-line' meaningfully in the sense that was employed by the first generation Video Grabber Download of Internet research".[7]
Slater asserts that there are legal and regulatory pressures to reduce Video Grabber Download the distinction between "on-line" and "off-line", with a "general tendency to assimilate online to offline and erase the distinction", stressing, however, that this Video Grabber Download does not mean that on-line relationships Video Grabber Download are Video Grabber Download being reduced to pre-existing Video Grabber Download off-line relationships. He conjectures that greater legal status may be assigned to on-line relationships Video Grabber Download (pointing out that contractual relationships, such as business transactions, on-line are already seen as just Video Grabber Download as "real" as their off-line counterparts), although he states it to be hard to imagine courts awarding palimony to people who have had a purely on-line sexual relationship. He also conjectures that an "on-line"/"off-line" distinction may be seen by people as "rather quaint and Video Grabber Download not quite comprehensible" within 10 years.[7]
The distinction Video Grabber Download where "on-line" is seen as virtuality Video Grabber Download and "off-line" as reality is sometimes inverted, with "on-line" concepts being used to define and Video Grabber Download to explain "off-line" activities, rather than (as per the Video Grabber Download conventions of the desktop metaphor with its desktops, trash cans, folders, and so forth) the other way around. Several cartoons by The New Yorker have satirized this. One includes Saint Peter asking for a user name and a password before Video Grabber Download admitting a man Video Grabber Download into Heaven. Another illustrates "the off-line Video Grabber Download store" where "All items are Video Grabber Download actual Video Grabber Download size!", where shoppers may "Take it home as soon as you pay for it!", and where "Merchandise may be handled prior to purchase!". |
