What are the different types of wireless network technologies

<< Applies to all editions of Windows 7 >>

Currently, there are four options: 802.11b, 802.11a, 802.11g, and 802.11n. The tables below compare these technologies.

802.11b

Speed : Up to 11 megabits per second (Mbps)

Pros : Has good signal range

Cons :

Ø      Has the slowest transmission speed.

Ø      Allows for fewer simultaneous users.

Ø      Uses 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

Ø      Allows for more simultaneous users

Ø      Uses the 5 GHz frequency, which limits interference from other devices

Cons

Ø      Has a shorter signal range, which is more easily obstructed by walls and other obstacles.

Ø      Is not compatible with 802.11b network adapters, routers, and access points

802.11g

Speed Up to 54 Mbps

Pros

Ø      Has a transmission speed comparable to 802.11a under optimal conditions.

Ø      Allows for more simultaneous users.

Ø      Has good signal range and isn't easily obstructed.

Ø      Is compatible with 802.11b network adapters, routers, and access points

Cons

Uses the 2.4 GHz frequency so it has the same interference problems as 802.11b

802.11n

Speed Depending upon the number of data streams the hardware supports, 802.11n can transmit data at up to 150 Mbps, 300 Mbps, 450 Mbps, or 600 Mbps

Pros

Ø      Has the fastest speed.

Ø      Uses multiple signals and antennas for better speed.

Ø      Allows for more simultaneous users.

Ø      Has the best signal range and isn't easily obstructed.

Ø      Is resistant to interference from other devices.

Ø      Can use either the 2.4 GHz or 5.0 GHz frequency.

Ø      If using 2.4 GHz frequency, it's compatible with 802.11g network adapters, routers, and access points

Cons

Ø      If using the 2.4 GHz frequency, it can have the same interference problems as 802.11b.

Ø      This protocol is still being finalized, and some requirements could change.

NOTE:- If you have more than one wireless network adapter in your computer or if your adapter uses more than one standard, you can specify which adapter or standard to use for each network connection. For example, if you have a computer that you use for streaming media to other computers on your network, you should set it up to use an 802.11a or 802.11n connection, if available, because you'll get a faster data transfer rate when you watch videos or listen to music.