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Let's learn a little about
the Laptop's most important module (besides the CPU!) and that's the built-in Wi-fi
radio...sometimes even an embedded mobile broadband modem...to connect through the cell towers!
Here we will delve into what is a Laptop's built-in Wi-Fi Radio - how it works and why you, as a Mobile
Device Broker and Liquidation Specialist should know this basic "fact set." Why? Because when you peruse your IT
Asset Disposal Availability and Spec sheets you need to know the "new" things that are occurring in the very fast-paced
Mobile Computing Cloud.
As you Mobile Device Brokers may have noticed, wireless technology has widely spread lately and you can
get connected almost anywhere; at home, at work, in libraries, schools, airports, hotels and even in middle to high class
The wireless networking is known as Wi-Fi (Wireless Fidelity) or 802.11
networking as it covers the IEEE 802.11 technologies. The major advantage of the Wi-Fi is that it is compatible with almost
every operating systems, game devices and advanced printers.
does Wi-Fi function?
Alike cell phones, a Wi-Fi
network makes use of radio waves to transmit information across a network. The computer should include a wireless adapter
that will translate data sent into a radio signal. This same signal will be transmitted, via an antenna, to a decoder known
as the router. Once decoded, the data will be sent to the Internet through a wired Ethernet connection. As the wireless network
will work as a two-way traffic, the data received from the Internet will also pass through the router to be coded into a radio
signal that will be receipted by the computerâ€™s wireless adapter.
Why Frequencies Matter
network will transmit at a frequency level of 2.4 GHz or 5GHz to adapt to the amount of data that is being sent by the user.
The 802.11 networking standards will somehow vary depending mostly on the person's needs, as explained below:
A - The 802.11a will transmit data at a frequency level of 5GHz. The Orthogonal Frequency-Division Multiplexing
(OFDM) used enhances reception by dividing the radio signals into smaller signals before reaching the router. You can transmit
a maximum of 54 megabits of data per second.
B - The 802.11b will transmit data at a frequency level
of 2.4GHz, which is a relatively slow speed. Also, you can transmit a maximum of 11 megabits of data per second.
C - The 802.11g will transmit data at 2.4GHz but can transmit a maximum of 54 megabits of data per second
as it also uses an OFDM coding.
D - The more advanced 802.11n can transmit a maximum of 140 megabits of
data per second and uses a frequency level of 5GHz.
Does a Hotspot Function?
The term hotspot is used to
define an area where Wi-Fi access is available. It can either be through a closed wireless network at home or in public places
like restaurants or airports.
As stated earlier, to be able to access hotspots, your computer should include a
wireless adapter. If you are making use of an advanced laptop model, it must probably include a built-in wireless transmitter
already. Else, you can purchase a wireless adapter that will plug into the PCI slot or USB port. Once installed, your system
will automatically detect the Wi-Fi hotspots and request connection. Else, you should make use of a software to handle this
task for you.