Page 18 - Trackpad_V5_Book 8
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We can group communication media into two categories: Guided media and unguided media.
The guided media includes cables and unguided media includes waves.
The unguided media are categorised into two types: long distance wireless and short distance
wireless media.
LONG DISTANCE WIRELESS MEDIA
It can support communication over longer distances up to thousands of kilometres. Long distance
wireless communication media includes microwave, radio wave, and satellites.
Microwave: It refers to microwave radio transmission which is commonly used to send signals
from the earth to the satellites and vice-versa. These wavers are also used for deep space
communications, radar systems, radio astronomy, etc.
Radio waves: These waves are commonly used for long distance communication or sending
messages, information for communication for aircraft or naval communication. The information
is sent in the form of electromagnetic waves.
SHORT DISTANCE WIRELESS MEDIA
Wi-Fi: It refers to Wireless Fidelity, which lets
you connect to the Internet without any wired
connection from your PC. It is a popular form
of wireless connection as it does not require
cables.
It can be used to get connected through a
variety of devices like laptops, digital cameras,
smartphones, gaming consoles, etc. To
connect to a Wi-Fi network a hotspot is
required. The hotspot acts as a gateway to the Internet, you need to connect to hot-spot to be
able to connect to the Internet.
Bluetooth: This wireless technology creates
a small wireless network called Personal
Area Network between personal computers
and peripheral devices such as printers,
mouse, keyboards, headphones, etc. It is
used to exchange data over a short distance
from fixed or mobile devices.
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