Huymobile
25-05-2008, 03:45
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design2710
802.11b:
Speed: Up to 11 megabits per second (Mbps)
Pros : * Costs the least
* Has the best signal range
Cons: *Has the lowest transmission speed
*Allows for fewer simultaneous users
*Users the 2.4 gigahertz (GHz) frequency (the same as many microwave ovens, cordless phones, and other appliances, which can cause interference
802.11a:
Speed: Up to 54 Mbps
Pros: *Has the fastest transmission speed
*Allows for more simultaneous users
*Users the 5 GHz frequency, which limits interference from other devices.
Cons: *Costs the most
*Has a shorter signal range, which is more easily obstructed by walls and other obstacles
*Is not compatible with 802.11b network adapter, routers, and access points
802.11g:
Speed: Up to 54Mbps
Pros: *Has a transmission speed comparable to 802.11a under optimal conditions
*Allows for more simultaneous users
*Has the best signal range and is not easily obstructed
*Is compatible with 802.11b network adapter, routers, and access points
Cons: *Users the 2.4 GHz frequency so it has the same interference problems as 802.11b
*Costs more than 802.11b
Access points
Access points (also called base stations) provide wireless access to a wired Ethernet network. An access point plugs into a hub, switch, or wired router and sends out wireless signals. This enables computers and devices to connect to a wired network wirelessly. Access points act a lot like cellular phone towers: you can move from one location to another and continue to have wireless access to a network. When you connect to the Internet wirelessly using a public wireless network in an airport, coffee shop, or hotel, you are usually connecting through an access point. If you want to connect your computers wirelessly and you have a router that provides wireless capability, you don't need an access point. Access points don't have built-in technology for sharing Internet connections. To share an Internet connection, you must plug an access point into a router or a modem with a built-in router.
design2710
802.11b:
Speed: Up to 11 megabits per second (Mbps)
Pros : * Costs the least
* Has the best signal range
Cons: *Has the lowest transmission speed
*Allows for fewer simultaneous users
*Users the 2.4 gigahertz (GHz) frequency (the same as many microwave ovens, cordless phones, and other appliances, which can cause interference
802.11a:
Speed: Up to 54 Mbps
Pros: *Has the fastest transmission speed
*Allows for more simultaneous users
*Users the 5 GHz frequency, which limits interference from other devices.
Cons: *Costs the most
*Has a shorter signal range, which is more easily obstructed by walls and other obstacles
*Is not compatible with 802.11b network adapter, routers, and access points
802.11g:
Speed: Up to 54Mbps
Pros: *Has a transmission speed comparable to 802.11a under optimal conditions
*Allows for more simultaneous users
*Has the best signal range and is not easily obstructed
*Is compatible with 802.11b network adapter, routers, and access points
Cons: *Users the 2.4 GHz frequency so it has the same interference problems as 802.11b
*Costs more than 802.11b
Access points
Access points (also called base stations) provide wireless access to a wired Ethernet network. An access point plugs into a hub, switch, or wired router and sends out wireless signals. This enables computers and devices to connect to a wired network wirelessly. Access points act a lot like cellular phone towers: you can move from one location to another and continue to have wireless access to a network. When you connect to the Internet wirelessly using a public wireless network in an airport, coffee shop, or hotel, you are usually connecting through an access point. If you want to connect your computers wirelessly and you have a router that provides wireless capability, you don't need an access point. Access points don't have built-in technology for sharing Internet connections. To share an Internet connection, you must plug an access point into a router or a modem with a built-in router.