Griha Pravesh Pregnancy

Introduction

Foreword

To complete a network of training a year in the context of training leave (CIF) to the AFPA Champs sur Marne, I did an internship in which I installed and secure a wireless network. This blog is the online report from my end of course, at least its theoretical part. The practical part, ie secure server by VPN and dedicated switcher (Bluesocket) is not published because it contains confidential data to the company. This is unfortunate but I intend to do an overhaul of the doc.
last point, I'm interested in all proposals job on this theme and any information or items that are added to the blog.


INTRODUCTION TO WIFI

Firstly I would like to clarify that the term Wi-Fi (Wireless Fidelity) is a label defined by the WECA (Alliance for the Wireless Ethernet Compatibility of equipment), but it is used as a common name representing the wireless links in the computer world. I take as a convention in this report, write Wi-Fi when it is the norm and when wireless is the generic term representing a wireless network.
Since establishment in 1997 of the 802.11 standard that defines a wireless LAN, and especially since the establishment of a standard Wi-Fi enabling interoperability between different devices on the market, the installation of this type network has grown exponentially.
This craze, individuals and corporations, resulting obviously a sale of wireless equipment very important and continues to grow, such as the U.S. research firm Dell'Oro Group, in a year-Fi card sales rose 69% in volume and 10% in value, thanks to the advent of 802.11g.
Another significant point is the creation of "hot spots" (public area for the wireless connection): the number of access points increased from 270 in 2001, 1000 and in 2001 more than 20,000 this year. This "explosion" due to a change in policy among the major telephone operators, they postpone their deployment UMTS in favor of wireless. Because, first new small operators "wifistes" gaining ground, and secondly the cost of a wireless terminal is ten times less than a UMTS terminal.
For an overview of wireless computing world, we can combine wireless users in four major groups:
-Home Spot: wireless network for individuals, there are many advantages such as lack of connection cable or sharing Internet access.

-Work Spot: business wireless network, in combination or instead of an Ethernet LAN, speed of installation and lower cost to wired network.

-Hot Spot: public networks open access to computers or PDA, run by operators or by telephone companies on public areas (stations, plazas, restaurants ...).

-associative networks: the use, by associations or local authorities, liaison wifi point to point over distances up to several kilometers, in particular to compensate for a lack of ADSL.
Each of these groups push the development of WiFi, but sometimes, interests and needs, another important factor in the expansion of radio links is the recent release of the ISM frequency band (used by wifi).
But wireless networks are maturing and have still many weaknesses in security, speed, quality of service or mobility devices.
My job during the EAP and the following specifications, is to see one aspect of the world of wireless networks: the enterprise.
I will first present the various standards, their operating principle, representing the theoretical need for a better understanding of wireless LANs. Then I would pursue a safety study current and future wireless networks (the current main weakness), setting up a wireless network and its security will finish my paper.