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These websites are known as mirror sites. In )] TJ ET BT 61.016 626.431 Td /F4 9.0 Tf [(computing, a mirror is an exact copy of a data set. On the Internet, a mirror site is an exact copy of another Internet site. )] TJ ET BT 61.016 615.442 Td /F4 9.0 Tf [(Mirror sites are most commonly used to provide multiple sources of the same information, and are of particular value as a )] TJ ET BT 61.016 604.453 Td /F4 9.0 Tf [(way of providing reliable access to large downloads. Mirroring is a type of file synchronization and a  )] TJ ET BT 461.678 604.453 Td /F2 9.0 Tf [(live mirror)] TJ ET BT 501.170 604.453 Td /F4 9.0 Tf [( is )] TJ ET BT 61.016 593.464 Td /F4 9.0 Tf [(automatically updated as soon as the original is changed. But why the need for more than one version of the same )] TJ ET BT 61.016 582.475 Td /F4 9.0 Tf [(website. A few reasons are:)] TJ ET BT 78.360 562.502 Td /F4 9.0 Tf [(1.)] TJ ET BT 91.016 562.486 Td /F4 9.0 Tf [(To preserve a website or page, especially when it is closed or is about to be closed.)] TJ ET BT 78.360 551.513 Td /F4 9.0 Tf [(2.)] TJ ET BT 91.016 551.497 Td /F4 9.0 Tf [(To allow faster downloads for users at a specific geographical location. For example, a U.S)] TJ ET 0.373 0.169 0.255 rg BT 452.663 551.497 Td /F4 9.0 Tf [(.)] TJ ET 0.373 0.169 0.255 RG 0.18 w 0 J [ ] 0 d 452.663 550.346 m 455.165 550.346 l S 0.153 0.153 0.153 rg BT 455.165 551.497 Td /F4 9.0 Tf [( server could be )] TJ ET BT 91.016 540.508 Td /F4 9.0 Tf [(mirrored in Japan, allowing Japanese Internet users to download content faster from the local Japanese server )] TJ ET BT 91.016 529.519 Td /F4 9.0 Tf [(than from the original American one.)] TJ ET BT 78.360 518.546 Td /F4 9.0 Tf [(3.)] TJ ET BT 91.016 518.530 Td /F4 9.0 Tf [(To provide access to otherwise unavailable information. 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The following websites are available to you )] TJ ET BT 61.016 377.662 Td /F4 9.0 Tf [(free of charge: A large amount of software downloads are available at )] TJ ET 0.373 0.169 0.255 rg BT 340.655 377.662 Td /F4 9.0 Tf [(http://support.sun.ac.za)] TJ ET 0.18 w 0 J [ ] 0 d 340.655 376.511 m 434.210 376.511 l S BT 436.712 377.662 Td /F4 9.0 Tf [(MIT OpenCourse Ware: )] TJ ET 0.18 w 0 J [ ] 0 d 436.712 376.511 m 534.740 376.511 l S BT 61.016 366.673 Td /F4 9.0 Tf [(http://ocw.sun.ac.za)] TJ ET 0.18 w 0 J [ ] 0 d 61.016 365.522 m 140.558 365.522 l S BT 143.060 366.673 Td /F4 9.0 Tf [(Mirror server for linux: http://ftp.sun.ac.za)] TJ ET 0.18 w 0 J [ ] 0 d 143.060 365.522 m 306.617 365.522 l S BT 309.119 366.673 Td /F4 9.0 Tf [(Mirror services available for free via TENET: )] TJ ET 0.18 w 0 J [ ] 0 d 309.119 365.522 m 488.156 365.522 l S BT 61.016 355.684 Td /F4 9.0 Tf [(http://www.mirror.ac.za)] TJ ET 0.18 w 0 J [ ] 0 d 61.016 354.533 m 153.032 354.533 l S 0.153 0.153 0.153 rg BT 153.032 355.684 Td /F4 9.0 Tf [( The most popular Linux distros are available \(Ubuntu,Debian, Fedora, Opensuse, Mandriva etc.\) )] TJ ET BT 61.016 344.695 Td /F1 9.0 Tf [(Complete programming language mirrors are availabla at:)] TJ ET BT 308.588 344.695 Td /F4 9.0 Tf [( CPAN \(perl\): )] TJ ET 0.373 0.169 0.255 rg BT 61.016 333.706 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.funet.fi/pub/languages/perl/CPAN/)] TJ ET 0.18 w 0 J [ ] 0 d 61.016 332.555 m 346.163 332.555 l S 0.153 0.153 0.153 rg BT 346.163 333.706 Td /F4 9.0 Tf [( CTAN \(Tex/Latex\): )] TJ ET 0.373 0.169 0.255 rg BT 61.016 322.717 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.dante.de/tex-archive/)] TJ ET 0.18 w 0 J [ ] 0 d 61.016 321.566 m 294.134 321.566 l S 0.153 0.153 0.153 rg BT 294.134 322.717 Td /F4 9.0 Tf [( Python: )] TJ ET 0.373 0.169 0.255 rg BT 329.657 322.717 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.python.org/)] TJ ET 0.18 w 0 J [ ] 0 d 329.657 321.566 m 523.760 321.566 l S 0.153 0.153 0.153 rg BT 61.016 311.728 Td /F1 9.0 Tf [(Mathematical languages:)] TJ ET BT 170.546 311.728 Td /F4 9.0 Tf [(SageMath: )] TJ ET 0.373 0.169 0.255 rg BT 216.572 311.728 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/www.sagemath.org/)] TJ ET 0.18 w 0 J [ ] 0 d 216.572 310.577 m 432.662 310.577 l S 0.153 0.153 0.153 rg BT 432.662 311.728 Td /F4 9.0 Tf [( Scilab \()] TJ ET 0.373 0.169 0.255 rg BT 61.016 300.739 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/scilab/www.scilab.org/)] TJ ET 0.18 w 0 J [ ] 0 d 61.016 299.588 m 286.097 299.588 l S 0.153 0.153 0.153 rg BT 286.097 300.739 Td /F4 9.0 Tf [( R )] TJ ET 0.373 0.169 0.255 rg BT 297.599 300.739 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/cran.za.r)] TJ ET 0.18 w 0 J [ ] 0 d 297.599 299.588 m 469.175 299.588 l S 0.153 0.153 0.153 rg BT 469.175 300.739 Td /F4 9.0 Tf [( Octava )] TJ ET 0.373 0.169 0.255 rg BT 61.016 289.750 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/octave)] TJ ET 0.18 w 0 J [ ] 0 d 61.016 288.599 m 224.096 288.599 l S 0.153 0.153 0.153 rg BT 226.598 289.750 Td /F1 9.0 Tf [(Opensource software:)] TJ ET BT 324.122 289.750 Td /F4 9.0 Tf [(sourceware.org: )] TJ ET 0.373 0.169 0.255 rg BT 61.016 278.761 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/sourceware.org/pub/)] TJ ET 0.18 w 0 J [ ] 0 d 61.016 277.610 m 279.617 277.610 l S 0.153 0.153 0.153 rg BT 282.119 278.761 Td /F1 9.0 Tf [(Free Office packages:)] TJ ET BT 375.656 278.761 Td /F4 9.0 Tf [( LibreOffice: )] TJ ET 0.373 0.169 0.255 rg BT 61.016 267.772 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/libreoffice/)] TJ ET 0.18 w 0 J [ ] 0 d 61.016 266.621 m 238.595 266.621 l S 0.153 0.153 0.153 rg BT 238.595 267.772 Td /F4 9.0 Tf [( OpenOffice: )] TJ ET 0.373 0.169 0.255 rg BT 291.623 267.772 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/openoffice/)] TJ ET 0.18 w 0 J [ ] 0 d 291.623 266.621 m 472.217 266.621 l S 0.153 0.153 0.153 rg BT 474.719 267.772 Td /F1 9.0 Tf [(Downloadable )] TJ ET BT 61.016 256.783 Td /F1 9.0 Tf [(antivirus updates:)] TJ ET BT 138.533 256.783 Td /F4 9.0 Tf [( Mcafee: )] TJ ET 0.373 0.169 0.255 rg BT 175.550 256.783 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.nai.com/)] TJ ET 0.18 w 0 J [ ] 0 d 175.550 255.632 m 358.637 255.632 l S 0.153 0.153 0.153 rg BT 358.637 256.783 Td /F4 9.0 Tf [( Symantec: )] TJ ET 0.373 0.169 0.255 rg BT 61.016 245.794 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.symantec.com /public/english_us_canada/antivirus_definitions/norton_antivirus/)] TJ ET 0.18 w 0 J [ ] 0 d 61.016 244.643 m 527.225 244.643 l S 0.153 0.153 0.153 rg BT 61.016 234.805 Td /F4 9.0 Tf [(Adobe Reader: )] TJ ET 0.373 0.169 0.255 rg BT 124.052 234.805 Td /F4 9.0 Tf [(http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.adobe.com/)] TJ ET 0.18 w 0 J [ ] 0 d 124.052 233.654 m 320.153 233.654 l S 0.153 0.153 0.153 rg BT 320.153 234.805 Td /F4 9.0 Tf [( SOURCE:  )] TJ ET 0.373 0.169 0.255 rg BT 368.663 234.805 Td /F4 9.0 Tf 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Mirror sites at your disposal

Did you know there are selected websites you have free access to? These websites are known as mirror sites.

In computing, a mirror is an exact copy of a data set. On the Internet, a mirror site is an exact copy of another Internet site. Mirror sites are most commonly used to provide multiple sources of the same information, and are of particular value as a way of providing reliable access to large downloads. Mirroring is a type of file synchronization and a  live mirror is automatically updated as soon as the original is changed.

But why the need for more than one version of the same website. A few reasons are:

  1. To preserve a website or page, especially when it is closed or is about to be closed.
  2. To allow faster downloads for users at a specific geographical location. For example, a U.S. server could be mirrored in Japan, allowing Japanese Internet users to download content faster from the local Japanese server than from the original American one.
  3. To provide access to otherwise unavailable information. For example, when the popular Google search engine was banned in 2002 by the People’s Republic of China, the mirror elgooG was used as a way of effectively circumventing the ban.
  4. To preserve historic content. Financial constraints and/or bandwidth prevent the maintainers of a server from keeping older and unsupported content available to users who still may desire them; a mirror may be made to prevent this content from disappearing.
  5. To balance load. If one server is extremely popular a mirror may help relieve this load this server may become overloaded with demand. Alternative download points allow the total number of download requests to be spread among several servers, maintaining the availability of the distribution.
  6. As a temporary measure to counterbalance a sudden, temporary increase in traffic.

SOURCE: www.wikipedia.org

Therefore, before you download huge files from an international server and run up an exorbitant internet account, check whether there is a local version available. The following websites are available to you free of charge:

A large amount of software downloads are available at http://support.sun.ac.za

MIT OpenCourse Ware: http://ocw.sun.ac.za

Mirror server for linux: http://ftp.sun.ac.za

Mirror services available for free via TENET: http://www.mirror.ac.za

The most popular Linux distros are available (Ubuntu,Debian, Fedora, Opensuse, Mandriva etc.)

Complete programming language mirrors are availabla at:

CPAN (perl): http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.funet.fi/pub/languages/perl/CPAN/

CTAN (Tex/Latex): http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.dante.de/tex-archive/

Python: http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.python.org/

Mathematical languages:

SageMath: http://ftp.sun.ac.za/ftp/pub/mirrors/www.sagemath.org/

Scilab (http://ftp.sun.ac.za/ftp/pub/mirrors/scilab/www.scilab.org/

R http://ftp.sun.ac.za/ftp/pub/mirrors/cran.za.r

Octava http://ftp.sun.ac.za/ftp/pub/mirrors/octave

Opensource software:

sourceware.org: http://ftp.sun.ac.za/ftp/pub/mirrors/sourceware.org/pub/

Free Office packages:

LibreOffice: http://ftp.sun.ac.za/ftp/pub/mirrors/libreoffice/

OpenOffice: http://ftp.sun.ac.za/ftp/pub/mirrors/openoffice/

Downloadable antivirus updates:

Mcafee: http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.nai.com/

Symantec: http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.symantec.com
/public/english_us_canada/antivirus_definitions/norton_antivirus/

Adobe Reader: http://ftp.sun.ac.za/ftp/pub/mirrors/ftp.adobe.com/

SOURCE:  www.wikipedia.org

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