N2.3 Wireless Technologies

Channels

The specific frequencies used to transmit data wirelessly.

Channel width

The range of frequencies within a channel that are used for transmitting data.

Non-overlapping channels

Channels that do not share any frequencies, minimizing interference between them.

Regulatory impacts

The influence of regulations on wireless communications.

802.11h

An amendment to the 802.11 standard that includes dynamic frequency selection and transmit power control to comply with European regulations.

Frequency options

Different frequency bands available for wireless communication.

2.4GHz

A frequency band used for wireless communication that offers longer range but lower speeds and more interference.

5GHz

A frequency band used for wireless communication that offers higher speeds and less interference but shorter range.

6GHz

A newer frequency band used for wireless communication, providing even higher speeds and less interference.

Band steering

A technique used to guide devices to connect to the optimal frequency band for better performance.

Service set identifier (SSID)

The name of a wireless network that differentiates it from other networks.

Basic service set identifier (BSSID)

The unique identifier of a specific access point within a wireless network.

Extended service set identifier (ESSID)

The SSID used in an extended service set, which includes multiple access points to cover a larger area.

Network types

Different configurations for wireless network structures.

Mesh networks

A network where each node relays data for the network, providing multiple paths for data to travel.

Ad hoc

A type of network where devices communicate directly with each other without using a central access point.

Point to point

A network configuration where a direct connection is established between two devices.

Infrastructure

A network configuration where devices communicate through a central access point.

Encryption

Methods used to secure wireless communications.

Wi-Fi Protected Access 2 (WPA2)

A security protocol for wireless networks that provides strong encryption and authentication.

WPA3

The latest security protocol for wireless networks, offering improved encryption and security features over WPA2.

Guest networks

Separate networks provided for visitors to allow internet access without giving them access to the main network.

Captive portals

Web pages that users must interact with before gaining access to a network, often used in guest networks for authentication and terms of service agreement.

Authentication

The process of verifying the identity of a user or device

Pre-shared key (PSK)

A shared secret key used for encryption, common in smaller or less secure networks

Enterprise

Uses a central authentication server, like RADIUS, for more secure and scalable authentication

Antennas

Devices that transmit and receive radio waves

Omnidirectional

Radiates signal in all directions equally

Directional

Focuses the signal in a specific direction, providing greater range and performance in that direction

Autonomous access point

Standalone device that handles all wireless functions independently

Lightweight access point

Relies on a centralized controller to manage and control wireless functions