Wi-Fi

Definition

Wi-Fi is a technology that allows electronic devices to connect to a wireless local area network (WLAN) using radio waves. It enables devices to access the internet and communicate with each other without the need for physical wired connections.

5 Must Know Facts For Your Next Test

1. Wi-Fi allows devices to connect to the internet and share data without the need for physical cables or wires.
2. Wi-Fi networks use radio waves to transmit and receive data, with different frequency bands offering varying performance characteristics.
3. The Wi-Fi Alliance is the organization responsible for certifying and promoting Wi-Fi technology, ensuring interoperability between different devices and manufacturers.
4. Wi-Fi technology has evolved over time, with newer standards such as 802.11ac and 802.11ax offering higher speeds and improved performance.
5. Wi-Fi security protocols, such as WPA2 and WPA3, help protect wireless networks from unauthorized access and data breaches.

Review Questions

• Explain how Wi-Fi enables wireless communication and internet access.
  • Wi-Fi allows electronic devices to connect to a wireless local area network (WLAN) using radio waves. This enables them to access the internet and communicate with each other without the need for physical wired connections. The devices can transmit and receive data over the WLAN, which is connected to the internet, allowing them to access online resources and share information wirelessly.
• Describe the role of frequency bands in Wi-Fi technology and their impact on performance.
  • Wi-Fi operates on specific frequency bands, typically 2.4 GHz and 5 GHz. The choice of frequency band can affect the range, speed, and interference characteristics of the wireless connection. The 2.4 GHz band has a longer range but is more prone to interference from other devices, while the 5 GHz band offers higher speeds but has a shorter range. The selection of the appropriate frequency band depends on the specific needs of the wireless network, such as the size of the coverage area and the required data throughput.
• Evaluate the importance of Wi-Fi security protocols in protecting wireless networks and data.
  • Wi-Fi security protocols, such as WPA2 and WPA3, play a crucial role in safeguarding wireless networks and the data transmitted over them. These protocols use encryption and authentication mechanisms to prevent unauthorized access and protect against data breaches. Without robust security measures, wireless networks would be vulnerable to various attacks, compromising the confidentiality, integrity, and availability of the information transmitted. The implementation of strong Wi-Fi security protocols is essential for maintaining the privacy and security of wireless communications, especially in sensitive or critical applications.

Related terms

WLAN (Wireless Local Area Network): A WLAN is a type of local area network that uses wireless radio communications to connect devices within a limited geographical area, such as a home, school, or office.

IEEE 802.11: IEEE 802.11 is a set of standards that define the communication protocols for WLAN technologies, including Wi-Fi.

Frequency Bands: Wi-Fi operates on specific frequency bands, typically 2.4 GHz and 5 GHz, which determine the range, speed, and interference characteristics of the wireless connection.