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| Wysłany: Pon 10:05, 16 Kwi 2007 Temat postu: |
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| Wysłany: Wto 19:55, 03 Sty 2006 Temat postu: |
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| LAN
Sieć lokalna (ang. Local Area Network stąd używany także w języku polskim skrót LAN) to najmniej rozległa postać sieci komputerowej, zazwyczaj ogranicza się do jednego budynku, lub kilku pobliskich budynków (np. bloków na osiedlu). Technologie stosowane w sieciach lokalnych można podzielić na rozwiązanie oparte na przewodach (kable miedziane, światłowody) lub komunikacji radiowej (bezprzewodowe). WAN Sieć rozległa (ang. Wide Area Network, WAN) - sieć łącząca sieci lokalne, inne (mniejsze) sieci rozległe, jak również pojedyncze komputery. Odbywa się to przy pomocy urządzeń sieciowych takich jak routery oraz urządzeń dostępowych takich jak modemy. Doskonałym przykładem sieci rozległych jest Internet. MAN Sieć miejska zwana MAN (ang. Metropolitan Area Network) to duża sieć komputerowa której zasięg obejmuje aglomerację lub miasto. Tego typu sieci używają najczęściej połączeń światłowodowych do komunikacji pomiędzy wchodzącymi w jej skład rozrzuconymi sieciami LAN. Sieci miejskie są budowane przede wszystkim przez duże organizacje rządowe, edukacyjne lub prywatne które potrzebują szybkiej i pewnej wymiany danych pomiędzy punktami w ramach miejscowości bez udziału stron trzecich. Przykładem sieci miejskich są sieci budowane przez ośrodki akademickie, które oprócz łączenia budynków uniwersyteckich w ramach kampusu muszą także połączyć ośrodki poza głównymi zabudowaniami. Takie sieci mają też połączenia WAN do innych uniwersytetów oraz często do Internetu. |
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| Wysłany: Wto 18:30, 27 Gru 2005 Temat postu: Pytanie nr 14 - Pojęcia sieci |
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| Pytanie 14 pojęcia sieci:
LAN-działają na ograniczonym obszarze geograficznym, umożliwiają jednoczesny dostęp wielu urządzeń do medium o dłuższej szerokości pasma, pozwalają na lokalne administrowanie siecią, zapewniają stały dostęp do lokalnych usług, zapewniają połączenie fizycznie sąsiadujących urządzeń. Wykorzystanie: koncentrator, router, most, wtórnik. WAN- działają na dużym obszarze geograficznym mogą łączyć kontynenty, umożliwiają dostęp przez wolne łącza, pracuje w obszarze czasowym(możemy porównać do wydzwaniania). Wykorzystanie: router, serwer komunikacyjny, modem. MAN- obejmuje swoim zasięgiem obszar miejski taki jak centrum miasta lub przedmieścia. Składa się z 2 lub więcej sieci LAN znajdujących się na wspólnym obszarze geograficznym. |
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