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802.11

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Transcript

IEEE 802.11

The Standard for Wireless Networks

Objectives

The aim of this session today is for you to:

  • Understand what 802.11 is
  • Recognise why 802.11 Standards are necessary
  • Compare and contrast the different Wireless Standards
  • Look at Frequency , Speed and Range
  • Check your understanding

What is 802.11 & why do we need it?

  • A Standard is a set of rules that are followed in the manufacture and configuration of digital devices
  • We need standardised rules so that different devices can work together, regardless of which company makes them
  • IEEE are the Institute of Electrical and Electronics Engineers. They work towards advancing technology and create the Standards followed by the IT industry
  • 802.11 governs how Wi-Fi works. How devices transmit and receive data
  • As technology improves and new demands are made on Wi-Fi, new versions of 802.11 are developed. Each version has a different letter after the 802.11, e.g. a, b, g, n, ac, ax

Where 802.11 fits in with the OSI Model

How to find out which 802.11 Standard your device is using

  • On your device, go to the search bar, type Command Prompt
  • Open the Command Prompt
  • Type the following command:
  • Netsh wlan show interfaces
  • Your device 802.11 Standard is shown as Radio Type

Make a note of your device 802.11 Standard, and also the

  • Transmit rate (Mbps)
  • Receive rate
  • Signal strength

As 802.11 Standards are developed, more devices have access to Wi-Fi technology The demands on the IEEE are always for more bandwidth and for connection of emerging technologies

Frequency 2.4 GHz or 5 GHz

A 2.4 GHz connection will travel further, but at lower speeds 5 GHz connections have higher speed, but a shorter range

Test your internet speed: www.speedtest.net

highspeedinternet.com/resources/2-4-ghz-vs-5-ghz-wi-fi

01:00

Recap

Today we have looked at: What 802.11 is, and the different versions of it. The differences between 2.4 GHz and 5 GHz frequencies

For your exam you will need to understand

  • The differences between 801.11 a, b, g, n, ax
  • The speed
  • The band 2.4 GHz or 5 GHz