Wireless Networking

 

Wireless Networking (WIFI)

Wi-Fi is wireless networking technology enabling various devices like computers, smartphones, and other equipment to connect to the Internet and communicate with each other without a cable. It creates a network where these devices can exchange information. These established connections through a wireless router act as an intermediary between the WiFi-compatible devices and the Internet. This technology allows seamless internet access and device communication in homes, offices, and in public spaces.


Types of Wi-Fi

Standards

Year of Release

Description

Wi-Fi-1 (802.11b)

1999

This version has a link speed from 2Mb/s to 11 Mb/s over a 2.4 GHz frequency band

Wi-Fi-2 (802.11a)

1999

After a month of release previous version, 802.11a was released and it provide up to 54 Mb/s link speed over 5 Ghz band

Wi-Fi-3 (802.11g)

2003

In this version the speed was increased up to 54 to 108 Mb/s over 2.4 GHz

802.11i

2004

This is the same as 802.11g but only the security mechanism was increased in this version

802.11e

2004

This is also the same as 802.11g, only Voice over Wireless LAN and multimedia streaming are involved

Wi-Fi-4 (802.11n)

2009

This version supports both 2.4 GHz and 5 GHz radio frequency and it offers up to 72 to 600 Mb/s speed

Wi-Fi-5 (802.11ac)

2014

It supports a speed of 1733 Mb/s in the 5 GHz band

 

 

Types of Wi-Fi Connections

LAN (Local Area Network)

A LAN operates within a limited area like an office building or home, connecting various devices such as computers, printers, and storage devices. It uses components like switches, routers, and cables, with Wi-Fi being the most common wireless form of LAN. Think of it as a network that serves a single location.

 

 

PAN (Personal Area Network)

A PAN is the smallest network type, centered around one person’s devices in a specific location, typically connecting personal gadgets like phones, computers, and gaming consoles. Bluetooth is the most well-known wireless PAN technology. These networks are perfect for personal use in homes or small offices.


MAN (Metropolitan Area Network)

A MAN covers a larger geographical area than a LAN, typically spanning across a city, college campus, or business complex. It’s designed to connect multiple locations within a metropolitan area, making it ideal for organizations that need to manage systems across several buildings or facilities.

                           

WAN (Wide Area Network)

A WAN is the largest network type, covering vast geographical areas like cities, countries, or even the entire globe – the Internet being the most famous example. It can encompass multiple smaller networks like LAN and MAN, and cellular networks are the most common type of wireless WAN.

 

 
 

How does a Wi-Fi work?

Wi-Fi is a wireless technology for networking, so it uses Electromagnetic waves to transmit networks. We know that there are many divisions of Electromagnetic waves according to their frequency such as X-ray, Gamma-ray, radio wave, microwave, etc, in Wi-Fi, the radio frequency is used. For transmitting Wi-Fi signal there is three medium.


Base Station Network or an Ethernet(802.3) Connection: It is the main host network from where the network connection is provided to the router.


  • Access Point or Router: it is a bridge between a wired network and a wireless network. It accepts a wired Ethernet connection and converts the wired connection to a wireless connection and spreads the connection as a radio wave.
  • Accessing Devices: It is our mobile, computer, etc from where we use the Wi-Fi and surfing internet.

 


Presented By

                        Narasimhan.S
                        III Bsc Computer Science
                        SRMVCAS(unaided)

  

 

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