Wireless Networks, Part 1: capacity and equipment Today, it is not uncommon for a house to have more personal computers and, as such, it only makes sense for them to share files, as well as to share an Internet connection. Plug the cable network is an option, but it is a May requiring the installation and management of large quantities of cables in order to save even a small house. With a team of wireless network will be extremely affordable and easy to install, perhaps worthy of consideration by those seeking to build a house, and those who want to extend an existing cable network. The first two rounds of Technical advice will provide an introduction to basic skills and equipment involved in wireless networks. When the foundation is established, we take a look at the configuration and security considerations that must be addressed at the installation is complete. Network The basic rule that covers the wireless networks is the Institute of Electrical and Electronic Engineers (IEEE) 802.11, which is close to the family standard Ethernet cable, 802.3. 802.11 recognize much easier if accompanied by a three suffixes (a, b, g), which is used to specify the precise protocol for wireless networks. The protocol 802.11a first stage coup in 2001, despite a slight increase in recent popularity, is by far the smallest of the three common at this time. The signals are transmitted in a radius of 5 GHz, while in travel g 2.4 GHz. Most means that the signal can travel the distance in less space and have more difficulty in penetrating the walls, making the practical implementation of an 802.11a network somewhat limited. The maximum transfer rate, but is about 54 Mbit / s, so it compensates for its low speed range respectable. As indicated above, 802.11b and 802.11g networks that operate at 2.4 GHz radio banda, which gives a much greater range, compared to 802.11. A disadvantage to be in the 2.4 GHz band is that many devices share and interference is linked to a problem. Cordless phones and Bluetooth devices are two of many elements operating in that rate. The choice of these two protocols is about 300 meters outdoors and the difference between the two is tantamount to speed. 802.11b comes first, published in 1999, offering speeds up to 11 Mbps. 802.11g first appeared in 2002 and is compatible upstream an improvement over 802.11b and offers speeds up to 54 Mbps. In addition to these protocols, some manufacturers have improved the standard 802.11gy can provide speeds up to 108 Mbps. It is not a separate protocol, but only a few changes in areas such as data compression better, more effective package of rupture, and through two radio stations simultaneously. Normally, stocks 802.11g equipment is not capable of these speeds, and stakeholders need to buy items defined as a response to 108 Mbps. I say this as befits components is not a standard protocol and the various manufacturers May adopt different approaches to reach such speeds. To ensure the best results when it comes to achieve these high speeds, components from the same manufacturer must be used at the same time. For example, only the mark Netgear nominal NIC 108 Mbit / s data transfer must be used with a Netgear WG624 wireless router (http://www.geeks.com/details.asp?invtid=WGT624NAR). Take into account the usual Internet connection banda anche provide rate data transfer of 10 Mbps or less, you can see that even 802.11b is more than enough if you just want to surf the Web. The sharing of files on the LAN (Local Area Network) is faster when the protocols really make a difference, and compare the prices of 802.11b and 802.11g components can show that there is little or no difference in the choice of stand-by for a comparable unit B device. Equipment access point? Wireless Access Point (WAP) is the central unit that controls the transmission of signals wirelessly to a network. A basic access May be able to handle up to 10 connections, and more robust AP might be able to handle up to 255 connections at the same time. D-Link DWL-1000AP + (http://www.dlink.com/products/?pid=37) is an example of an access point capable of 802.11b wireless transmissions. Router? In technical terms a little, a router is a device that sends packets of data. In general, the connection between at least two networks, for example, on the local network or a local area network and ISP (Internet Service Provider). For our purposes, for pleasure and simplicity, a router is, in principle, a wireless access point with the added feature of having a port to share an Internet connection banda reeds. D-Link AirPlus G (http://www.geeks.com/details.asp?invtid=DI524-R&cat=NET) is a capable 802.11g router, which provides access to many wireless connections and lasts four-connection cable to a WAN (Wide Area Network Internet). A typical router for domestic use is generally less expensive than an access point, and the adjustment in the firmware, can be used as an access point anyway. By wire or wireless, all computers using the router can share files over the network and share an Internet connection banda reeds. Wireless communication between computers (or a wireless computer and a computer cable) for a maximum of 54 Mbps, while communication between computers wired to take full advantage of 100 Mbit / s is available to 802.3 Protocol. Network adapter? A network card is required for each computer you want to be connected to the wireless network. Many notebook computers, Sony Centrino 1.5 GHz (http://www.geeks.com/details.asp?invtid=PCGZ1RA-R&cat=NBB) now includes a wireless adapter, so that no additional equipment necessary. For those with systems that do not have integrated wireless capabilities, add them is simple, and can be done with the help of a number of connections. Desktops can go wireless by adding a PCI-slot network adapter, which measure 802.11g D-Link DWL-G510 (http://www.dlink.com/products/?pid=308). Notebook users can easily add pcmcia wirelessly using an adapter, because the device supports 802.11g (http://www.geeks.com/details.asp?invtid=PBW006-N&cat = NET). And really suitable for plug-n-play wireless network, USB adapters to 802.11g dongle (http://www.geeks.com/details.asp?invtid=80211GWUD&cat=NET) is available. Antenna / Extender? These items are not indispensable, but given the unique features of a wireless environment, which could be useful. Devices that Hawking Hi-Gain Antenna (http://www.geeks.com/details.asp?invtid=HAI6SIP-N&cat=NET) or Super cantenna (http://www.geeks.com/details.asp ? Invtid = SCB10 & cat = NET) used to increase the signal strength and wireless, thereby expanding the scope of a wireless network. Not only a great field seats to be filled, but the signal can be improved in structure with walls and floors that prevent the transmission of signal. Last words of this Tech Tip, we take a look at the base of wireless networks in terms of capabilities and equipment. In the second part of this two-part series, we'll see some of the basic configuration and security considerations that should be taken into account. The physical installation of a wireless network may be easier than exponentially a cable network, but the hardest part is the creation of software and security to ensure that everything is still in place and working well . Jason Kohrs
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