What is Wi-Fi

Wi-Fi (Wireless Fidelity)

Wi-Fi is a short name for Wireless Fidelity alternative network to wired network which is commonly used for connecting devises in wireless transmission media mode. Generally, use to any type of IEEE 802.11 Wireless Local Area Network (WLAN). Wi-Fi is a wireless networking technology of enable computers and other devices to communicate over a wireless signal. Wi-Fi is the standard computers connect to wireless networks. Modern computers and devises have built connecting chips that allows users to find and connect the Wi-Fi router. The router must be connected to internet (by using DSL or cable modem) in order to provide in internet access for the connected devises.

Wi-Fi is works in hotspot is created by installing an access point to an internet connection and that access point acts as a base station. Normally a single access point can support up to 30 users and can function within a range of 100-150 feet indoors and up to 300 feet outdoors.  

There many standers in here the Wi-Fi,

802.1x

This standard improves LAN security by providing an authentication framework that allows users to authenticate to a central authority such as LDAP or Active Directory. Combined with 802.11 access technologies, it provides an efficient mechanism for controlling wireless LAN access.

802.11a

An extension of the 802.11 standard, developed by IEEE for wireless network technology. The 802.11a standard applies to wireless LANs and supports a maximum connection speed of 54 Mbps in the 5 GHz band. This specification is not backwards compatible with 802.11b / g and requires special wireless adapters.

802.11b

An extension of the 802.11 standard, developed by IEEE for wireless network technology. The 802.11b standard applies to wireless LANs and supports a maximum connection speed of 11 Mbps with a pullback to 5.5, 2, and 1 Mbps in the 2.4 GHz ISM band. This standard was ratified in 1999.

802.11g

An extension of the 802.11 standard that allows a maximum connection speed of 54 Mbps while ensuring compatibility with the 802.11b standard in the 2.4 GHz band. This specification is compatible and free for the 802.11b standard.

802.11i

An extension of the 802.11 standard that offers more security than the 802.11 extensions. This enhancement provides improved encryption methods and integration of the IEEE 802.1x authentication protocol and advanced encryption mechanisms such as the Advanced Encryption Standard (AES) for an optional and fully compatible 802.11i implementation.

802.11n

It uses multiple antennas for transmitters and receivers (MIMO) to enable higher speed and greater data width. This is not a standard ratified since December 2006. Pre-standard hardware is commercially available and is not compatible with Wireless PittNet.

 Advantages of Wi-Fi network

·       Not needed wires to access the internet because of that no wire damages and maintainers

·         Users can move around freely within the area of the network with their devises.

·         User can share files and other resources to other devises that are connected to the network without having be cabled to port.

·         It can serve a suddenly-increased number of clients with the existing equipment.

·         Easy to manage access the internet

·         Sometimes handle a large amount of users because they are not limited by a specific number of connection ports.

 Disadvantages of Wi-Fi network

•        File sharing transfer speeds are normally slower with wireless networks than the wired network.
•         Wireless setup sometimes bit difficult to people who are not experience with computers.
•          General speed of a wireless network usually slower than the wired one.
•       Less secure and can be easier to hack into.