Transmission Media
⟶ Transmission media is the mode or medium through which data is transferred from sender to receivers.⟶ It is component of physical layer in OSI Model.
⟶ Types of transmission media
1. Guided media
⟶ The medium which used physical path for data transmission is called guided media.
⟶Also called bound or wired media
a. Twisted pair cable
⤷ Networking cable which consists of 4 pair of cable, each pair twisted together
⤷ Used RJ-45 as connector
⟶ Types
i. Shielded Twisted pair
⤷ Cable enclosed with foil or mesh shield
ii. Unshielded Twisted pair
⤷ Cable not enclosed with foil or mesh shield
b. Coaxial Cable
⤷ It is a copper cable, primarily used in cable TV
⤷ Used BNC as connector
c. Optical Fiber cable
⤷ The medium that transfer data in the form of the light
⤷ It’s inner surface is coated with glass or plastic
⤷ It is the fastest medium for data transmission
2. Unguided media
⟶ The medium that doesn’t use physical path for data transmission
⟶ It transferred data through electromagnetic wave or signal
⟶ Also called unbound or wireless media
⟶ Types of unguided media
a. Radio wave
⤷ Frequencies range from 3 KHz to 1 GHz
⤷ Used for multicasting or broadcasting
⤷ E.g. Radio/TV broadcasting, cordless phone, etc.
b. Microwave
⤷ Frequencies ranges from 1 GHz to 300 GHz
⤷ Limited to Light of Sight (LOS)
⤷ Used in cellular phone, satellite network, mobile network
c. Satellite
⤷The physical object that revolves around the earth.
⤷ Used in weather forecasting, Radio/TV broadcasting, etc
d. Infrared
⤷ Frequencies ranges from 300 GHz to 400 GHz
⤷ Used in TV remotes, wireless keyboard or mouse
e. Bluetooth
⤷ A short range communication technology
⤷ Used in mobile, laptop
f. WiFi
⤷ Stands for Wireless Fidelity
⤷ Used to connect wireless internet
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