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DIGITAL COMMMUNICTION, image - Coggle Diagram
DIGITAL COMMMUNICTION
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ETHERMET:
the traditional technology for connecting devices in a wired local area network (LAN) or wide area network
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WIRELESS 
WIFI
access in towns and cities. Wi-Fi is a wireless technology used to connect devices to a network. That network can itself then be connected to the internet, so that devices connected to the Wi-Fi network can connect to the internet.
Wi-Fi uses the IEEE 802.11 specification of standards for wireless communication. The specification is revised regularly to take account of improvements in technology. Each revision to the specification is given a different letter or pair of letters at the end. The first version was IEEE 802.11a.
Each revision of the technology improves the speed at which data can be transferred and increases the distance over which devices can connect.
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BLUETOTH
Bluetooth is a type of wireless connectivity that lets devices connect over short distances. It cannot carry as much data as Wi-Fi. Bluetooth devices need to be paired with each other before they can communicate.
Bluetooth can be used to transfer small files between devices. It is used to connect devices such as smartphones and laptops to peripherals such as portable speakers, headphones, earphones, keyboards and mice.
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3G AND 4G
ffers faster data speeds than 2G, allowing for mobile internet browsing, video calling, and basic streaming.
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Uses technologies like UMTS (Universal Mobile Telecommunications System) and HSPA (High-Speed Packet Access).
4G
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Supports HD video streaming, online gaming, and high-speed browsing.
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