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Wi-Fi Wireless Networks and Technology

Members: ELEFANTE, Waylord LACUESTA, Maynard VALBUENA, Lucky VILLANOS, Lian Paul

Wi-Fi Wireless Networks and Technology

Computer usage has dramatically increased in past few years which in result brought immense technology enhancement in every field possible. Technology has reached to its heights but thirst of knowledge is still in race and will always be till end of the world. Wireless communication between computers is certainly one of the most appreciated and used technology globally. In ´Computersµ Wi-Fi replaced traditional wired networks between two or more computers, it enabled file transferring from server to clients and vice versa possible without wires, networking cards, hubs and other important networking related hardware. Using Wi-Fi internet connection can be shared among computers with minimum usage of hardware, WLAN cards enable feature of wireless networking among devices, wireless routers help to broadcast wireless networking signals in given area.

WiFi is a long-distance, transportable connectivity technology for individual, business or for certain geographical area. Millions of people all over the world use WiFi in their homes to converse to anyone on the planet with WiFi connected devices. This technology was make-believe by the Institute of Electrical and Electronic Engineers in 1997. Through wifinotes.com you can take pleasure in the experiencing precisely what is all about wireless networks. Here you can get detailed information about WiFi, how it works, WiFi Security which tools protect your wireless network more etc. Enjoy knowledge of broad selection of W-Fi product such as Desktop Wireless Wi-Fi Cards, Laptop / Notebook Wireless Wi-Fi Cards, Wireless Wi-Fi Routers, Wireless Wi-Fi USB Adapters, and Handhelds and PDAs. Wifinotes.com comprehended the wifi limitations as security concerns, interference from other devices, and lacking high-quality media streaming, terminologies such as gigahertz, wibro, hotspot, wifi finder, and access point, features, pan including loss of confidentiality, loss of integrity, loss of avaiability, and solution like management solutions, operational solutions, and technical solutions and types of network as you get more about wifi. If you are going to make a wireless network and you are looking for how to do it ? then you are at very right place here you will spend less time and learn more because we are here for those who want a bit more . Now days every one has crazed of wireless network due to services beyond imagination. Here you will find all features of wifi where you can understand how much useful they are for you. Browse each section of website to understand concept of wireless networking. Wi-Fi is on going technology, every now and then some thing new in wireless technology shows up. Wi-Fi technology is by far the most used

technology world wide as every one is realizing growing needs for being wireless which is impacting our daily lives and our businesses. In below section we will talk about latest news related to Wi-Fi from around the world wide.
Home Network Technology & Connectivity Use: Ethernet, 802.11, Coax, and Powerline

Based upon the results of our North American broadband survey, the majority of consumers with a home network that use Wi-Fi are still not very/not at all familiar with the benefits and differences between 802.11g and 802.11n. Although this may limit upgrades in the short term, the older Wi-Fi standards will be discontinued eventually anyway. Other wired technologies that use coax, phone wiring, and powerline are also beginning to make strides with telcos deploying telco TV services. The number of home LAN physical layer interface shipments will surpass 500 million in 2010, and the installed base of home networks will surpass 300 million in 2011. Global and regional forecasts are provided for home networks, with North America, Europe, and Asia/Pacific broken down by use of Ethernet, Gigabit Ethernet, 802.11a, 802.11b, 802.11g, 802.11n, and other wired solutions. In addition, global home network interfaces by physical layer are included, since the majority of network-enabled devices have both wired and wireless connectivity options.
Serial to Wi-Fi Interface

The proliferation of the Internet and recent networking technologies has changed the way the business is managed. There are billions of the devices used in POS terminals, inventory management, facilities and security management etc, which are not network-capable and therefore restrained from being accessed or controlled over the network. With the advent of machine-tomachine technologies coupled with WiFi, these devices can be made network capable, monitored and controlled wirelessly from any where in the world. The RS9110-N-11-22 has got full network suite including TCP/IP stack, application protocols like FTP, Web server etc, along with 802.11bgn drivers and 802.1x supplicant embedded into its dual-threaded ThreaArchΠprocessor. Thus, it eases integration and provides a cost effective low power Serial-to-WiFi solution to any device, which has UART or SPI interface.

802.11 Wireless Standards The family of 802.11 standards from IEEE includes several variations on high-speed wireless communication protocols including 802.11a and 802.11b. Wireless Standards - 802.11b 802.11a 802.11g and 802.11n Home and business networkers looking to buy wireless local area network (WLAN) gear face an array of choices. Many products conform to the 802.11a, 802.11b, 802.11g, or 802.11n wireless standards collectively known as Wi-Fi technologies. Additionally, Bluetooth and various other non Wi-Fi technologies also exist, each also designed for specific networking applications. This article describes the Wi-Fi and related technologies, comparing and contrasting them to help you make educated network building decisions. 802.11 In 1997, the Institute of Electrical and Electronics Engineers (IEEE) created the first WLAN standard. They called it 802.11 after the name of the group formed to oversee its development. Unfortunately, 802.11 only supported a maximum network bandwidth of 2 Mbps - too slow for most applications. For this reason, ordinary 802.11 wireless products are no longer manufactured. 802.11b IEEE expanded on the original 802.11 standard in July 1999, creating the 802.11b specification. 802.11b supports bandwidth up to 11 Mbps, comparable to traditional Ethernet. 802.11b uses the same unregulated radio signaling frequency (2.4 GHz) as the original 802.11 standard. Vendors often prefer using these frequencies to lower their production costs. Being unregulated, 802.11b gear can incur interference from microwave ovens, cordless phones, and other appliances using the same 2.4 GHz range. However, by installing 802.11b gear a reasonable distance from other appliances, interference can easily be avoided. Pros of 802.11b - lowest cost; signal range is good and not easily obstructed Cons of 802.11b - slowest maximum speed; home appliances may interfere on the unregulated frequency band 802.11a While 802.11b was in development, IEEE created a second extension to the original 802.11 standard called 802.11a. Because 802.11b gained in popularity much faster than did 802.11a, some folks believe that 802.11a was created after 802.11b. In fact, 802.11a was created at the same time. Due to its higher cost, 802.11a is

usually found on business networks whereas 802.11b better serves the home market. 802.11a supports bandwidth up to 54 Mbps and signals in a regulated frequency spectrum around 5 GHz. This higher frequency compared to 802.11b shortens the range of 802.11a networks. The higher frequency also means 802.11a signals have more difficulty penetrating walls and other obstructions. Because 802.11a and 802.11b utilize different frequencies, the two technologies are incompatible with each other. Some vendors offer hybrid 802.11a/b network gear, but these products merely implement the two standards side by side (each connected devices must use one or the other).
Pros of 802.11a - fast maximum speed; regulated frequencies prevent signal interference from other devices Cons of 802.11a - highest cost; shorter range signal that is more easily obstructed 802.11g In 2002 and 2003, WLAN products supporting a newer standard called 802.11g emerged on the market. 802.11g attempts to combine the best of both 802.11a and 802.11b. 802.11g supports bandwidth up to 54 Mbps, and it uses the 2.4 GHz frequency for greater range. 802.11g is backwards compatible with 802.11b, meaning that 802.11g access points will work with 802.11b wireless network adapters and vice versa. Pros of 802.11g - fast maximum speed; signal range is good and not easily obstructed Cons of 802.11g - costs more than 802.11b; appliances may interfere on the unregulated signal frequency 802.11n The newest IEEE standard in the Wi-Fi category is 802.11n. It was designed to improve on 802.11g in the amount of bandwidth supported by utilizing multiple wireless signals and antennas (called MIMO technology) instead of one. When this standard is finalized, 802.11n connections should support data rates of over 100 Mbps. 802.11n also offers somewhat better range over earlier Wi-Fi standards due to its increased signal intensity. 802.11n equipment will be backward compatible with 802.11g gear. Pros of 802.11n - fastest maximum speed and best signal range; more resistant to signal interference from outside sources

Cons of 802.11n - standard is not yet finalized; costs more than 802.11g; the use of multiple signals may greatly interfere with nearby 802.11b/g based networks. What About Bluetooth and the Rest? Aside from these four general-purpose Wi-Fi standards, several other related wireless network technologies exist. Other IEEE 802.11 working group standards like 802.11h and 802.11j are extensions or offshoots of Wi-Fi technology that each serve a very specific purpose. Bluetooth is an alternative wireless network technology that followed a different development path than the 802.11 family. Bluetooth supports a very short range (approximately 10 meters) and relatively low bandwidth (1-3 Mbps in practice) designed for low-power network devices like handhelds. The low manufacturing cost of Bluetooth hardware also appeals to industry vendors. You can readily find Bluetooth in the networking of PDAs or cell phones with PCs, but it is rarely used for general-purpose WLAN networking due to the range and speed considerations. WiMax also was developed separately from Wi-Fi. WiMax is designed for longrange networking (spanning miles or kilometers) as opposed to local area wireless networking. The following IEEE 802.11 standards exist or are in development to support the creation of technologies for wireless local area networking: y y y y y y y y y y y y

802.11a - 54 Mbps standard, 5 GHz signaling (ratified 1999) 802.11b - 11 Mbps standard, 2.4 GHz signaling (1999) 802.11c - operation of bridge connections (moved to 802.1D) 802.11d - worldwide compliance with regulations for use of wireless signal spectrum (2001) 802.11e - Quality of Service (QoS) support (not yet ratified) 802.11F Inter-Access Point Protocol recommendation for communication between access points to support roaming clients (2003) 802.11g - 54 Mbps standard, 2.4 GHz signaling (2003) 802.11h - enhanced version of 802.11a to support European regulatory requirements (2003) 802.11i - security improvements for the 802.11 family (2004) 802.11j - enhancements to 5 GHz signaling to support Japan regulatory requirements (2004) 802.11k - WLAN system management (in progress) 802.11l - skipped to avoid confusion with 802.11i

y y y y y y y y y

y y y y y The Official IEEE 802.11 Working Group Project Timelines page is published by IEEE to indicate the status of each of the networking standards under development.

802.11m - maintenance of 802.11 family documentation 802.11n - 100+ Mbps standard improvements over 802.11g (in progress) 802.11o - skipped 802.11p - Wireless Access for the Vehicular Environment 802.11q - skipped 802.11r - fast roaming support via Basic Service Set transitions 802.11s - ESS mesh networking for access points 802.11T - Wireless Performance Prediction - recommendation for testing standards and metrics 802.11u - internetworking with 3G / cellular and other forms of external networks 802.11v - wireless network management / device configuration 802.11w - Protected Management Frames security enhancement 802.11x - skipped (generic name for the 802.11 family) 802.11y - Contention Based Protocol for interference avoidance

A hotspot is any location where Wi-Fi network access (usually Internet access) is made publicly available. You can often find hotspots in airports, hotels, coffee shops, and other places where business people tend to congregate. Hotspots are considered a valuable productivity tool for business travelers and other frequent users of network services. Technically speaking, hotspots consist of one or several wireless access points installed inside buildngs and/or adjoining outdoor areas. These APs are typically networked to printers and/or a shared high-speed Internet connection. Some hotspots require special application software be installed on the Wi-Fi client, primarily for billing and security purposes, but others require no configuration other than knowledge of the network name (SSID). Wireless service providers like T-Mobile generally own and maintain hotspots. Hobbyists sometimes setup hotspots as well, often for non-profit purposes. The majority of hotspots require payment of hourly, daily, monthly, or other subscription fees. Hotspot providers strive to make connecting Wi-Fi clients as simple and secure as possible. However, being public, hotspots generally provide less secure Internet connections than do other wireless business networks.

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