Overview: 3G is a mobile communication standard that succeeded 2G (second generation) networks. It provides faster data transfer rates, allowing for improved mobile internet access, video calling, and other multimedia services.
Technical Details:
Network Architecture: 3G networks use a packet-switched architecture, allowing data to be transmitted in packets rather than circuit-switched like 2G networks.
Frequency Bands: 3G operates on various frequency bands, including the 850 MHz, 900 MHz, 1.8 GHz, and 2.1 GHz bands.
Data Transmission: 3G supports data rates ranging from 144 kbps (kilobits per second) to several megabits per second, depending on the specific technology (e.g., HSPA, EV-DO).
Wi-Fi (Wireless Fidelity):
Overview: Wi-Fi is a wireless networking technology that allows devices to connect and communicate over a local area network (LAN) without the need for physical cables.
Technical Details:
Frequency Bands: Wi-Fi operates in the 2.4 GHz and 5 GHz frequency bands. The 2.4 GHz band has multiple channels, and the 5 GHz band provides higher data rates and less interference.
Standards: Wi-Fi standards such as 802.11b, 802.11g, 802.11n, 802.11ac, and 802.11ax define the specifications for communication, including data rates, modulation schemes, and channel widths.
Security: Wi-Fi networks use various security protocols like WEP, WPA, and WPA2 to protect against unauthorized access.
Data Transmission: Wi-Fi provides data rates ranging from a few megabits per second (802.11b) to several gigabits per second (802.11ax).
