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Guida e Tutorials WIFI
Introduzione al WIFI
Access Point
Antenne
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Info Padova Wireless
Una Guida per i Mac
Tabella comparativa 802.11


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Tabella comparativa 802.11

[Stampa]

Tabella comparativa standard 802.11

Standard wireless

802.11b

802.11a

802.11g

Diffusione

* * *

Molto diffusa nel mondo

*

Tecnologia nuova

* *

Nuova tecnologia in rapida crescita
Velocità

11
Mbps

Sopra gli 11Mbps
(nota:I modem coprono al massimo 4-5 Mbps)

54
Mbps

Sopra i 54Mbps (5 volte più veloce del 802.11b)

54
Mbps

Sopra i 54Mbps (5 volte più veloce del 802.11b)
Costo relativo

Basso costo   Relativamente costosa   relativamente a basso costo
Frequenza

2,4
GHz

Più affollata. Si può incorre in qualche conflitto con apparecchiature funzionanti su queste frequenze

5
GHz

Banda poco affollata, può coesistere con una WLan funzionante su 2,5GHz

 2,4
GHz

Più affollata. Si può incorrere in qualche conflitto con apparecchiature funzionanti su queste frequenze
Copertura

30-45 metri
indoor

Buona copertura, dipendente dal disegno della stanza e dai materiali riflettenti

8-23
metri
indoor

Scarsa copertura tipicamente in interni copre un raggio di 8-23

30-45 metri
indoor

Buona copertura, dipendente dal disegno della stanza e dai materiali riflettenti
Accesso pubblico   Hot spots in rapida crescita in tutto il mondo   Attualmente nessuno   La compatibilità con 802.11b permette una rapida crescita
Compatibilità OK Grande adozione OK Incompatibilità con 802.11b e/o 802.11g OK Interoperabilità con 802.11b (a 11Mbps)
Incompatibilità con 802.11g
802.11b 802.11a 802.11b
802.11g



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