1.1.4 Data Packets and Frequency

 

Data Packets

Data packets are small units of data into which information is divided before being sent over a network. These packets travel through the network separately and are reassembled at the destination to form the original information.

 

Importance of Data Packets

• Help send information faster
• Make data transfer more reliable
• Improve communication over long distances

 

Each data packet contains a part of the information along with details such as the sender's address and receiver's address, ensuring that it reaches the correct destination.

 

Frequency

In telecommunication, frequency refers to the number of times a signal is transmitted in one second. It affects how data is sent and received through communication channels.

 

Importance of Frequency

i. Wi-Fi and Bluetooth communication
ii. Mobile networks such as 4G and 5G
iii. Radio and television broadcasting
iv. RFID systems and microwave ovens

 

 

Units of Frequency

• kHz (Kilohertz) = 1,000 cycles per second
• MHz (Megahertz) = 1,000,000 cycles per second
• GHz (Gigahertz) = 1,000,000,000 cycles per second

 

Examples of Frequency Use

Technology	Frequency Range	Purpose
Wi-Fi	2.4 - 2.5 GHz	Wireless Internet
Bluetooth	2.4 - 2.5 GHz	Connecting wireless devices
FM Radio	88 - 108 MHz	Radio broadcasting
AM Radio	530 - 1710 kHz	Long-distance radio communication
Microwave Oven	2.45 GHz	Heating food
RFID (UHF)	860 - 960 MHz	Smart cards and tracking systems
Television (UHF)	470 - 890 MHz	Digital TV broadcasting
5G Cellular (mmWave)	24 - 100 GHz	Very fast mobile communication