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