How Do Wireless Laptops Work?

6 Answers

Anonymous Profile
Anonymous answered
Instead of using a cable to connect your laptop to a physical network or Internet access point, you can connect it with a wireless radio link – a radio frequency (RF) carrier.

A radio transmitter generates this carrier, which is just radio frequency electromagnetic energy that we radiate from one antenna and receive on another.

The only reason we generate it is to carry information, from your laptop to the network access point's receive antenna, and from the access point transmitter back to your laptop. The radio link works in both directions.

The laptop needs to have a wireless card installed. This has a radio transmitter, a radio receiver and a Modem. The wireless card transmits the RF carrier, and during transmission, it puts (modulates) the information onto the carrier.

The network/Internet access point also has a transmitter and a receiver. Some of the energy transmitted from the laptop’s wireless card antenna reaches the network access point receiver antenna.

So the network access point antenna receives a small amount of the transmitted energy (with the information modulated onto it) from the laptop wireless card transmitter. The Modem removes the original information from it (demodulates the carrier) and the computer
processes the information.

And it works the other way too, from the access point back to the laptop.

The laptop controls the flow of information to and from the wireless card’s Radio Modem. The Modem MODulates the RF carrier during transmission and DEModulates it during reception. This is where the name Modem came from.

You can get different types of cards; some communicate with Wireless Local Area Networks (eg. WiFi), when you’re within range (a few metres), or wider area cellular networks when you’re outside the range of an otherwise-accessible WiFi network. Some cards are fitted inside the laptop and others plug in externally.

Learn more about wireless Internet cards for laptops.
Madbiker McMad Profile
Madbiker McMad answered
Laptops universally support the wireless ethernet protocol 802.11g, or variants of it. A 2.4GHz radio signal (similar to mobile phones) is transmitted between the laptop and a wireless Internet gateway of some sort (eg, a home wireless ADSL router or a Wi-Fi hotspot), and this radio signal has all the request and response data embedded in it.

The wireless protocol must allow lots of wireless devices to be communicating at once - or at least, they must be able to share the wireless network. If two laptops transmit messages at exactly the same time, the router will receive a garbled version of both messages, and both laptops will know this too. The protocol makes sure that this happens as infrequently as possible, to make the communication process faster and error-free.
Francisco Benavides Jr Profile
It would depend on the type of wireless card your computer has.
Suhail Ajmal Profile
Suhail Ajmal answered
The laptops don't have any wire. They use fax modems and some laptops use wireless modems to connect to the internet.

The wireless laptop works the same as our CPU works. The only difference is that you don't see wires in wireless laptops.

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