#Wireless Networking

 

Wireless Networking

It allows one or more devices to communicate with each other without any physical connection such as cables. Wireless technologies uses radio frequency transmission for  transmitting data. Wireless data can be found on college campuses in office building etc.

Component required

Wireless devices communicate with the help of radio frequency waves. The important component required for setting up a wireless networks are Access point, Extension point, Wireless Bridge, Powerline Bridges, antenna’s Wireless adaptor, wi-fi station and servers.

Access and Extension Point

An Access point devices are used to establish a connection between two or more wireless devices. It is a device that bridges have wireless connection and a wired connection.

 It is a HUB that maintains data flow between your wired and wireless Network. It’s Work on 1 layer.there are 2 types of Access point.

Hardware Access Point                Software Access Point

Extension Point

Extension points are used if a single access point is not able to cover the entire area.

Wireless and power-line Bridges

It is used to connect two or more wireless networks in a large home or across the street or between two-buildings. Bridges can be connected to the networks either through point to point or point to multipoint connections.

Powerline Bridges

It is used to penetrate a  wireless Network . when it is not possible to connect to the Network, when it is not possible to connect to the network.

 For example-

you have a room that has metal shelving, so it is difficult for the wireless router to reach the desired Network. You can use a pair of powerline bridges to connect to the router to an access point via your electrical wiring.

Antennas

Antennas are used to Increase the range of the wireless Network. Antenna transmit signal In different ways there are 2 types of Antenna.

Omni directional Antenna                    Directional Antennas

 

Adaptors

Wireless Adaptor Card helps to connect the computer or PDA to a Network. The Wireless adaptors are available as PC cards PCI and Mini PCI , USB, Compact Flash, and SCSI Device.

Wireless Station and Server

Wireless LAN Consist of Wireless Station and Wireless Servrer. Devices that can Connect to the wireless network through a Wireless Medium are known as Stations . 

The station Communicate with the help of the wireless network Interface cards. Wireless NIC has to be Installed In each of the station. There are two types of station.

Wireless Clients                             Access Points

Software

The wireless Network adaptor requires two type of software so as to function properly with an O.S. that is driver and a Configuration utility.

Types of Wireless Network

Wireless Network can be established using two different ways.

Peer to Peer(P2P) or Adhoc-

In this multiple Computer’s are connected wirelessly using wireless network Interface. This Network allows wireless devices to directly communicate with each other. Wireless Devices which are within each other range can communicate with each other.

Infrastructure W-LAN

Access Point can also be used to setup wireless Network. In this type Network the wireless device connects to the access point to the network. It is widely used Wireless LAN.

Wireless Standard

Wireless technology works as per the standards accepted worldwide and offer different levels of Security. The different wireless standard that are used for wireless Networking are IEEE 802.11, Bluetooth, HomeRF etc.

IEEE 802.11 Standards

802.11

802.11a

802.11b

802.11g

802.11n

Securing Wireless Network

Networking makes it easy to share Internet access and data. But you wouldn’t want to share your information with just anyone. Below are 5 essential Security measures you should take to secure your wireless Network.

Changing the default Password

Changing the default SSID

Enabling WPA Encryption

Disabling SSID broadcast

Enabling MAC address Filtering

Wireless Wide Area Network

It’s allow you to establish a wireless network using radio or mobile phones connection can be established over a city or country. Wireless WAN use cellular Network Technology such GSM, GPRS, CDMA , etc.

Mobile Computing

it allows you to wirelessly connect and use information and application which is centrally located. Mobile technology uses 3 different ways to transmit and receive signals. 

Packet Radio Communication

Cellular Networks

Satellite Stations