Wireless Networks, Part 1: Capabilities and Hardware
It is not uncommon for home personal computers to exist and as such, it only makes sense to be able to share files to share the Internet connection. Wired network management is an option, but you may need to install and manage great wiring to make even a modest home setting available. Wireless networking tools are extremely affordable and easy to install, so consider building a home network and expanding existing wired networks.
The first installment of the two – a series of Tech Tips shows the core capabilities and hardware involved in wireless networks. After you create this base, we'll look at some of the installation and security considerations that must be handled after the physical installation is completed.
The core wireless network is the Institute of 802.11 Electrical and Electronics Engineers (IEEE), which is close to the wired Ethernet standard, 802.3. Many will find it easier to recognize 802.11 if they are accompanied by three (a, b or g) suffixes used to determine the exact protocol of a wireless network.
The 802.11a protocol hit the scene for the first time in 2001, the small waves of recent popularity, the least known among the least known. The signals are transmitted at 5 GHz radio frequency, while "b" and "g" are transmitted at 2.4 GHz. Higher frequency means that the signal may be less distant from the free space and it will pass through the walls in a heavier time, so the practical use of an 802.11a network is limited. However, the maximum transfer rate is approximately 54 Mbps, allowing a limited range at a respectable speed.
As mentioned, the 802.11b and 802.11g networks operate on a 2.4 GHz frequency band, which provides a much greater range than 802.11a. One disadvantage is that it is on the 2.4 GHz band that many devices share and interference is mandatory. Cordless phones and Bluetooth devices are two of the elements that work on this frequency. The scope of the two protocols is approx. 300 feet in free air, and the difference between the two accelerates. The 802.11b first appeared in 1999 and offers up to 11 Mbps. The 802.11g first appeared in 2002 and results in disadvantageous compatibility with 802.11b and up to 54 Mbps.
In addition to these protocols, some manufacturers have improved their 802.11g standard and up to 108 Mbps. This does not include a separate protocol, but only a bit of a bit in areas such as better data packet, more efficient data packets, and two radio channels simultaneously. Generally, the 802.11g kit is not capable of these speeds, and customers need to buy fitting components that require 108 Mbps support. I say "it is the same as the components" because it is a non-standard protocol and different manufacturers can adopt a different approach to achieve these speeds. In order to achieve the best results in order to achieve higher speeds, the same ingredient components should be used together. For example, only netgear network adapters should be used for data transmission of 108 Mbps, such as the Netgear WG624 wireless router ( http://www.geeks.com/details.asp?invtid=WGT624NAR ).
Given that typical broadband Internet connectivity offers 10 Mbps or less data rates, it can be seen that even 802.11b is more than adequate if you just want to surf the Internet. When sharing files on a local network, faster protocols actually make a difference and comparing the prices of 802.11b and 802.11g components shows that a device with a "b" capability is hardly different in selecting a "g" device.
Hardware  Access point – The wireless access point (WAP) is the central device that manages the transmission of wireless signals over the network. A base access point can handle up to 10 connections, and stronger APs can handle up to 255 connections at once. The D-Link DWL-1000AP + ( http://www.dlink.com/products/?pid=37 ) is an example of a 802.11b wireless access point
Router – In a somewhat technical sense the router is a network device that transmits data packets. Usually there is a connection between at least two networks, such as two LANs or LANs and ISPs (ISPs). For simplicity, the wireless router is essentially an access point whose added property is that it has a port to share broadband Internet connection. The D-Link AirPlus G ( http://www.geeks.com/details.asp?invtid=DI524-R&cat=NET ) is an 802.11g capable router that provides access to many wireless connections and four wired connections for a WAN (Wide Area Network Internet) connection. The router typically used for home use is generally cheaper than an access point and through the settings in the firmware, otherwise it can only be used as an access point. Wired or wireless router-based computers can share files over the network as well as broadband Internet connections. Communication between wireless computers (or wireless computers and wired computers) max. 54 Mbps, while communication between landline computers takes full advantage of the 100 Mb / s provided through the 802.3 protocol
AC Adapter – is required for any computer you want to connect to a wireless network. Many laptops, such as the Sony Centrino 1.5GHz ( http://www.geeks.com/details.asp?invtid=PCGZ1RA-R&cat=NBB ) now have a built-in wireless adapter, so no extra hardware is required. For systems that do not have wireless capabilities, adding them is quite simple and can be done through a number of connections. Desktop PCs can be wirelessly accessed by adding a PCI slot with a network adapter such as 802.11g D-Link DWL-G510 ( http://www.dlink.com/products/?pid=308 ). Notebook users can easily connect wirelessly to a PCMCIA adapter, such as the 802.11g device ( http://www.geeks.com/details.asp?invtid=PBW006-N&cat=NET ). And the really convenient plug-n-play connection to wireless networks, USB adapters such as the 802.11g dongle ( http://www.geeks.com/details.asp?invtid=80211GWUD&cat=NET )
Antenna / Extender – These items are not necessarily useful but may be useful due to the wireless environment. Devices such as the 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) serves the purpose of increasing the wireless signal strength and therefore extends the scope of a particular wireless network. Not only can the large area of the free space be discovered, but the quality of the signs can improve on the walls and on the floor structures that hinder signal transmission.
In this Tech Tip, we look at the basics of wireless networking as it relates to capabilities and hardware. In the second part of the two series, we look at the basic set-up and security considerations that need to be addressed. Physical installation of the wireless network may be exponentially easier than a wired network, but the heaviest part of the software and security can be configured to ensure that it stays and operates without any incident