What is Wi-Fi
Wi-Fi is the name of a particular standard for a type of wireless network developed for computer communications. It eliminates cables and solve problems of distance, obstacles. The connection uses radio waves. To connect to the network without son, computers, modems and peripherals must be equipped with receivers / transmitters Wi-Fi. They come in several forms like USB Wi-Fi adapter , Wi-Fi PCI card or PCMCIA Wi-Fi for laptops.
There are several WLAN standards:
- 802.11a: standard for local area networks using the 5 GHz frequency as for transfers up to 54 Mbps.
- 802.11b: another standard for local networks, using the 2.4 GHz with a maximum bandwidth of 11 Mbps.
- 802.11g: the most successful standard for large networks, uses the 2.4 GHz with the maximum bandwidth of 54 Mbps.
It might replace the two previous standards. Unlike a wired network, the bandwidth varies with distance. More perimeter is, the more the performance is optimal. For example, to take advantage of 11 Mbps, the maximum range is 25 to 50 meters indoors and 160 meters in open terrain. The nature of walls, ceilings, walls and plays heavily on the quality and network performance. Of Wi-Fi antennas optional, used to amplify the signal, can in some cases, be installed.
WI-FI technology, based on the 802.11 standard, allows you to create a local network without the need for wiring to connect computers together. To implement a wireless solution, it is imperative to bring to an access point Wi-Fi. In order to "talk" to the access point, each machine must be equipped with an Ethernet-WI FI or WI-FI USB Adapter.
WI-FI and ADSL
So that machines on a LAN can receive an ADSL connection, different manufacturers offer a wide range of products that will fit everyone's needs. To take advantage of a shared wireless connection you can choose between several types of equipment.
- ADSL Ethernet modem for connecting
- A router to share your connection on the different positions of the local network
- An access point Wi-Fi to do without any wiring.
To avoid buying these three different materials, manufacturers offer products all in one:
The Modem Router Wireless : Ideal if you have no modem or router. This type of product has everything you need since it modem + router + access point. It is cheaper to buy this all-in-one than buying three separate products.
The wireless router: We generally opt for this solution when one already has an Ethernet modem. The access point will be useful only if you have an Ethernet modem + router or if you have a modem router. So many possibilities to you according to the material that you already own. In all cases, the computers wishing to receive a wireless connection will have to be equipped with an internal wireless card or USB wireless adapter in order to communicate with the access point. These wireless devices will replace the conventional Ethernet cards. It is of course possible to connect some machines on the router if they are close to it, and use wireless technology for more remote computers.
Advance Wireless Technology
With this technology, finite network cables that run into the house to connect your various PCs, more than holes in walls or ceilings to access computers on the upper floors. The system easily installs in minutes and all your computers communicate with each other, then you can exchange files, play together and share internet and printer. For those who are equipped with a laptop, nothing more comfortable than the mobility in the home, while remaining both connected to the Internet and connected to other machines.
Wi-Fi Network Setup
There are two ways of installing Wi-Fi wireless network , Ad-hoc method that allows to install a wireless network between two PCs and the infrastructure mode, which gives the possibility of building a wireless network between multiple PCs.
The Ad-Hoc mode is a mode called point to point. This means that the mode Ad-Hoc "to connect two computers together, each having a wireless network card (pci Wi-Fi for a landline and Wi-Fi pcmcia card for a laptop) without a Wi-Fi access point. This system still limits as the number of users is limited to 11 maximum. For a WAN, it is better to choose infrastructure mode.
The method Infrastructure
For more than two computers networked wirelessly, it is necessary to acquire a wireless access point (AP) or wireless router. The Wi-Fi access point will allow you to shared data, peripherals and Wi-Fi router , more developed, may eventually connect a wired network and be used for other functions (firewall, integrated ADSL modem). In infrastructure mode, in contrast to Ad-Hoc, so customers spend one or several access points to communicate. These access points function as well as wired network hubs (hub / switch). When the wireless network uses several access points, for example a corporate network, it is necessary to refer to regularly access points acting as relay terminals in the area you want covered.
How to mount and install a Wi-Fi network ?
Each workstation should be equipped with a Wi-Fi adapter. If you have more than two computers then you also need a Wi-Fi access point or wireless router .
1) You want to install two wireless PC network
Just equip each of the two PCs with a wireless adapter, such as a PCI Wi-Fi card for landline and wireless PCMCIA card for your laptop. This will not only have your networked computers but also to share the Internet connection or a device connected to one of two PCs.
2) You want to install multiple wireless network PC
From 3 PCs, it requires a Wi-Fi access point or wireless router. The Wi-Fi access point will only allow you to share data between PCs and peripherals connected to PCs on. The wireless router offers you the possibility to connect a wired network, share an Internet connection, etc. Some Wi-Fi routers have additional features such as: integrated ADSL modem, firewall, print server, etc. The Wi-Fi router is often the best solution compared to single Wi-Fi access point . A Wi-Fi router simply allows direct connection of an Ethernet ADSL modem, Internet connection and will be constantly available even if the other PCs on the network are off.