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OpenWRT Table of Hardware

OpenWRT Table of Hardware

10 Ways To Boost a WiFi Signal Wireless devices are everywhere now... from laptops and netbooks, to smartphones, tablets and ebook readers. Even printers and hard drives can be connected to a wifi network. So it's important to get the best possible signal from your wireless router. Position The Router - Yes, where you place your router does matter. If you're looking for optimal wireless coverage in various parts of your home, position the router in the middle of the house. Do you have any tips or tricks to boost a wifi signal? IEEE 802.11 Un article de Wikipédia, l'encyclopédie libre. Exemple d'équipement fabriqué sur les recommandations de la norme IEEE 802.11. Ici, un routeur avec switch 4 ports intégré de la marque Linksys. Présentation de la norme[modifier | modifier le code] IEEE 802.11 fait partie d'un ensemble de normes édictées sous l'égide du comité de standardisation IEEE 802. Le schéma ci-dessous est une adaptation du synopsis du standard IEEE 802 consigné dans la section "introduction" de la plupart des normes publiées sous ce standard. L'ensemble articulé autour de la norme IEEE 802.11 se décompose en éléments identifiés comme suit : Tableau des principaux amendements du standard IEEE 802.11[modifier | modifier le code] Le standard 802.11 a été amélioré à plusieurs reprises depuis son approbation par l'IEEE. D'autres amendements qui concernent principalement la couche MAC du standard ont aussi été validés : 802.11ac[modifier | modifier le code] Notes et références[modifier | modifier le code]

NSLU2-Linux - Main / HomePage browse Urban Wireless - Parabolic Reflector This parabolic reflector antenna, made with cardboard and foil, can increase your wireless reception by 6dB. The performance of this reflector is comparable many commercially produced antennas. How to make: Download Template or another reflector template design : parabolreflector_en.pdfOpen in a graphic app and resize as desired. Note: If printed at the download size you will see about 9 dBi of gain. Six inch reflector pattern at 2.4 GHz: Source: lf361, SystemAdministration: Réseaux sans fil sous Linux Introduction Les réseaux sans-fil (IEEE 802.11b/a/g) deviennent de plus en plus populaires à mesure que les périphériques sans-fil deviennent bon marché et que de plus en plus d'organisations fournissent un accès sans-fil à leur personnel ou au public. Quasiment tout nouvel ordinateur portable possède une carte sans-fil intégrée et les plus anciens ont une carte réseau sans-fil PCMCIA. Même les ordinateurs de bureau peuvent avoir des cartes réseaux sans-fil USB, voire des cartes réseaux sans-fil intégrées. D'autre part, les points d'accès (Access Point en anglais ou AP) sans-fil sont déployés sur les campus universitaires, les bâtiments contenant des bureaux, les hôtels, les habitations, etc. De ce fait, dans le monde Linux, il est dès lors tout aussi essentiel de pouvoir avoir accès aux réseaux sans-fil. Fonctionnement des cartes réseaux sans-fil Il n'existe pas une méthode unique pour installer les pilotes étant donné la multitude de vendeurs et de cartes se trouvant sur le marché.

Projects I have been contributing to the free software and open source software communities for more than 20 years. Searching back through Google, it seems my first public open source contribution was in June 1990. One of my early major contributions was an Emacs editing mode for the VHDL hardware description language. That was accepted into the mainstream Emacs distribution in 1993, and is still in use and actively maintained today (maintainership has been transitioned to other developers who still actively use the VHDL language in their work). My foray into software for handheld and embedded devices began with the HP 200LX palmtop computer. After a side-trip into the world of PalmOS programming (contributing user-interaction improvement utilities for the Treo range of PDAs), I moved into the world of custom firmware for embedded networking devices. I contributed to the Linksys WRT54G and Asus WL500g custom firmware communities for some time, including both software and hardware contributions.

Cantenna 5.5 GHz cantenna as a feedhorn Cantennas are typically used to increase the range of (or discover) Wi-Fi networks. Construction[edit] The cylinder portion of the can may consist of metal-coated paperboard. Although some designs are based on a Pringles potato chips can, this tube is too narrow to increase the signal by a useful amount.[1] However, a cantenna can be made from various cans or tubes of an appropriate diameter.[2] Some designs include a pole mount to elevate the cantenna.[3] At 2.4 GHz, losses can occur if the cable from the cantenna to the Wi-Fi circuitry is too long. Use[edit] Cantennas are typically used for extending a wireless local area network (WLAN). The tiny design makes them ideal for mobile applications such as wardriving. Cantennas can be used to increase cell phone range,[5] improve reception, and decrease noise. A cantenna can be used as a satellite dish feed horn. Cantennas may be used with other RF devices such as wireless security cameras.[7] See also[edit]

Spanning tree protocol Le problème[modifier | modifier le code] Les réseaux commutés de type Ethernet doivent avoir un chemin unique entre deux points, cela s'appelle une topologie sans boucle. En effet, la présence de boucle génère des tempêtes de diffusion qui paralysent le réseau : tous les liens sont saturés de trames de diffusion qui tournent en rond dans les boucles et les tables d'apprentissage des commutateurs (switch) deviennent instables. Une solution serait de ne pas tirer les câbles en surnombre de manière à ne pas avoir de boucles dans le réseau. L'algorithme de « spanning tree minimum » garantit l'unicité du chemin entre deux points du réseau tout en n'interdisant pas les câbles en surnombre. Mode de fonctionnement[modifier | modifier le code] L'algorithme STP procède en plusieurs phases : élection du commutateur racine, détermination du port racine sur chaque commutateur, détermination du port désigné sur chaque segment, blocage des autres ports. 6. Il existe trois types de BPDU :

HowTo / HomePage browse This page should list all different sets of instructions that detail how to do stuff with the NSLU2, in a neat organised manner. Think of it as a big list of recipes. More factual information (as opposed to instructions) should go under the Information area instead. Put each recipe on a separate page, and don't be afraid to UseAVeryLongPageNameWhichDescribesHowToDoSomething. The page name should be a verb, should use an "active voice" (e.g. say "Build" instead of "Building"), and should complete the phrase "How To ....". For HowTo's that are specific to a particular development stream (like Unslung or OpenSlug), look in the related project area. Completed These How-To's are complete, although it is possible they might be improved in the future as understanding grows. Hardware RedBoot/Flash Cross Development Native Development Projects Peripherals Network Services Network Security Services Remote Access Network File Sharing Backup Schemes Web Services & Applications Email Services Chat & VoIP Services Wiki

Parabolic Templat Custom Search (c) M. Erskine 2002-2015 All Commercial Rights Reserved My Bitcoin Address - Please Donate NOTE: Some pictures on this site are contributed by persons who have built this antenna, all pictures on this site are used with the permission of their author(s). E-Mail Here FAQ Here Gallery of Successful Builds Advantages over other antennas such as the Pringles Can Antenna I needed a parabolic reflector to eliminate off property coverage. The drawing can be scaled upon a copy machine to make a dish of any reasonable size. There is a square drawn upon the diagram. Focal length varies with the size of the dish (but proportionally) therefore the focal point is also shown on the drawings. Parabolic reflectors also loose gain if your finished reflector varies much from the correct curve. The reflector is designed to be fed by a dipole. The reflector is designed to be "square". The template is a bit large but be patient. Gallery of Successful Builds: Paul L. Lots More Pictures

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