\nW j\u0119zyku angielskim serwer jest \"servant\/servant\" i w szerszym znaczeniu r\u00f3wnie\u017c \"service\". Serwer ten zapewnia Dane<\/a>Zapewni to dost\u0119p do program\u00f3w lub innych zasob\u00f3w, do kt\u00f3rych mog\u0105 mie\u0107 dost\u0119p inne komputery.
\nZnowu trzeba r\u00f3\u017cnicowa\u0107. Albo serwer jest komputerem (hostem), na kt\u00f3rym dzia\u0142aj\u0105 inne serwery (klienci). W tym przypadku serwer dostarcza sprz\u0119t, kt\u00f3ry jest u\u017cywany przez innych.
\nAlbo serwer jest programem (klientem), kt\u00f3ry komunikuje si\u0119 z komputerem lub programem (klientem), kt\u00f3ry ma do niego dost\u0119p i tym samym dostarcza mu dane, inne programy i inne us\u0142ugi.<\/p>\n
Serwer wirtualny<\/h3>\n
VPS, znany r\u00f3wnie\u017c jako \"wirtualny serwer prywatny\" lub \"vserver\", robi zasadniczo to samo, co opisane powy\u017cej.
\nJe\u015bli utworzysz taki serwer, najpierw przydzielisz mu pewn\u0105 ilo\u015b\u0107 pami\u0119ci i otrzyma on sta\u0142y udzia\u0142 w CPU lub to jak wysoka powinna by\u0107 moc obliczeniowa serwera.
\nOznacza to, \u017ce \u017caden dodatkowy sprz\u0119t nie jest wymagany do dostarczenia i u\u017cytkowania tego VPS, ale mo\u017ce by\u0107 po prostu ustawiony na istniej\u0105cym sprz\u0119cie. Sprz\u0119t wykorzystywany do tego celu nie istnieje w rzeczywisto\u015bci, ale jest dostarczany przez system nadrz\u0119dny (host).
\nMo\u017cna to r\u00f3wnie\u017c wyprowadzi\u0107 z nazwy: jest to wizualizacja systemu.<\/p>\n
Teraz pojawia si\u0119 pytanie o u\u017cyteczno\u015b\u0107 serwera wirtualnego.
\nNa pytanie mo\u017cna odpowiedzie\u0107 w prosty spos\u00f3b: Dok\u0142adnie tak samo jak w przypadku \"normalnego\" serwera.
\nR\u00f3\u017cnica mi\u0119dzy tymi dwoma systemami polega z jednej strony na cenie. Je\u015bli chcesz naby\u0107 \"prawdziwy\", a nie wirtualny serwer, musisz najpierw kupi\u0107 niezb\u0119dny sprz\u0119t.
\nDlatego te\u017c zaleca si\u0119 wynaj\u0119cie VPS od zewn\u0119trznego dostawcy. Dostawca ten zapewni Ci wtedy po\u017c\u0105dan\u0105 przepustowo\u015b\u0107. Na przyk\u0142ad, je\u015bli prowadzisz sklep internetowy i zauwa\u017cysz, \u017ce z czasem na Twojej stronie pojawia si\u0119 coraz wi\u0119cej go\u015bci, mo\u017cesz teraz elastycznie zwi\u0119ksza\u0107 swoj\u0105 \u0142adowno\u015b\u0107.<\/p>\n
Zalety serwera wirtualnego<\/h3>\n
Je\u015bli chcesz wpa\u015b\u0107 z powrotem na taki VPS, ten system ma t\u0119 zalet\u0119, \u017ce mo\u017cna kontrolowa\u0107 wszystko z jednego centralnego punktu i dlatego teoretycznie s\u0105 niezale\u017cne geograficznie i mog\u0105 utrzymywa\u0107 sw\u00f3j serwer z dowolnego miejsca na \u015bwiecie. Wi\u0119c je\u015bli jeste\u015b np. kim\u015b, kto finansuje swoje \u017cycie przez internet, jest to idealne rozwi\u0105zanie w por\u00f3wnaniu do serwera stacjonarnego.<\/p>\n
VPS mo\u017cna por\u00f3wna\u0107 do maszyny wirtualnej (VM), gdzie programowi przydzielana jest r\u00f3wnie\u017c pewna ilo\u015b\u0107 pami\u0119ci i pojemno\u015b\u0107 obliczeniowa. Wszystko, co dzieje si\u0119 w tym systemie - tzn. zmienia ustawienia, ca\u0142kowicie niszczy system - nie ma wp\u0142ywu na system g\u0142\u00f3wny, tzn. system operacyjny, na kt\u00f3rym wszystko dzia\u0142a. Kr\u00f3tko m\u00f3wi\u0105c, serwer wirtualny robi zasadniczo to samo, co standardowy serwer. Du\u017c\u0105 zalet\u0105 tego jest jednak ekranowanie systemu. Nie wszystkie dane s\u0105 naruszone, gdy tylko system zostanie zaatakowany. Oszcz\u0119dzasz r\u00f3wnie\u017c czas, kt\u00f3ry musia\u0142by\u015b po\u015bwi\u0119ci\u0107 na utrzymanie tego ostatniego, lub pieni\u0105dze, kt\u00f3re musia\u0142by\u015b zap\u0142aci\u0107 komu\u015b, aby to zrobi\u0142 za ciebie.<\/p>","protected":false},"excerpt":{"rendered":" Im Zuge des Fortschritts auf dem Gebiet der modernen Technologie und des stark anwachenden Berufsfeldes der „Digitalen Nomaden“ ist die Option eines virtuellen Servers (VPS) durchaus interessant. Mit ihm sind Sie an keinen festen Ort gebunden; sparen sich gegebenenfalls einiges an Anschaffungs- und Instandhaltungskosten, sowie vor allem Zeit. Und Zeit ist mit das Einzige, das 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<\/a>Kolejn\u0105 zalet\u0105 jest to, \u017ce mo\u017cliwe jest okre\u015blenie z g\u00f3ry, ile zasob\u00f3w VPS powinien zu\u017cywa\u0107 z rzeczywistego komputera. W zale\u017cno\u015bci od celu VPS, b\u0119dzie on wi\u0119kszy lub mniejszy, a zatem Koszty<\/a> por\u00f3wnywalne.
\nPonadto, wynajmuj\u0105c serwer VPS, oszcz\u0119dzasz nie tylko na kosztach zakupu, ale tak\u017ce na kosztach konserwacji i serwisu.
\nOg\u00f3lnie rzecz bior\u0105c, korzystanie z VPS jest zalecane dla tych, kt\u00f3rzy maj\u0105 ju\u017c pewn\u0105 liczb\u0119 odwiedzaj\u0105cych na swoich stronach internetowych - pocz\u0105tkuj\u0105cy mo\u017ce r\u00f3wnie\u017c zacz\u0105\u0107 od prostszych rozwi\u0105za\u0144 (np. wsp\u00f3lny hosting<\/a>).<\/p>\n
\nZ serwerem wirtualnym niewiele si\u0119 to r\u00f3\u017cni. Jest to r\u00f3wnie\u017c jedna z zalet wersji wirtualnej. Ka\u017cdy VPS ma sw\u00f3j w\u0142asny system operacyjny. Je\u015bli korzystasz teraz z kilku gier na wynaj\u0119tym serwerze i do\u015bwiadczasz atak\u00f3w z\u0142o\u015bliwego oprogramowania na jeden z VPS, to tylko ten system jest dotkni\u0119ty, a pozosta\u0142e serwery pozostaj\u0105 nienaruszone.<\/p>\n