cnp3-ebook/protocols/lan — French @ Weblate

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134 ../../protocols/wifi.rst:9
	English In the 1970s, after the first experiments with ALOHANet, interest in wireless networks grew. Many experiments were done on and outside the ARPANet. One of these experiments was the `first mobile phone <http://news.bbc.co.uk/2/hi/programmes/click_online/8639590.stm>`_ , which was developed and tested in 1973. This experimental mobile phone was the starting point for the first generation analog mobile phones. Given the growing demand for mobile phones, it was clear that the analog mobile phone technology was not sufficient to support a large number of users. To support more users and new services, researchers in several countries worked on the development of digital mobile telephones. In 1987, several European countries decided to develop the standards for a common cellular telephone system across Europe : the `Global System for Mobile Communications` (GSM). Since then, the standards have evolved and more than three billion users are connected to GSM networks today.
	French 0/9790 · 979 Needs editing
135 ../../protocols/wifi.rst:13
	English While most of the frequency ranges of the radio spectrum are reserved for specific applications and require a special license, there are a few exceptions. These exceptions are known as the `Industrial, Scientific and Medical <http://en.wikipedia.org/wiki/ISM_band>`_ (ISM) radio bands. These bands can be used for industrial, scientific and medical applications without requiring a license from the regulator. For example, some radio-controlled models use the 27 MHz ISM band and some cordless telephones operate in the 915 MHz ISM. In 1985, the 2.400-2.500 GHz band was added to the list of ISM bands. This frequency range corresponds to the frequencies that are emitted by microwave ovens. Sharing this band with licensed applications would have likely caused interference, given the large number of microwave ovens that are used. Despite the risk of interference with microwave ovens, the opening of the 2.400-2.500 GHz allowed the networking industry to develop several wireless network techniques to allow computers to exchange data without using cables. In this section, we discuss in more detail the most popular one, i.e. the WiFi [IEEE802.11]_ family of wireless networks. Other wireless networking techniques such as `BlueTooth <http://en.wikipedia.org/wiki/BlueTooth>`_ or `HiperLAN <http://en.wikipedia.org/wiki/HiperLAN>`_ use the same frequency range.
	French 0/13650 · 1365 Needs editing
136 ../../protocols/wifi.rst:15
	English Today, WiFi is a very popular wireless networking technology. There are more than several hundreds of millions of WiFi devices. The development of this technology started in the late 1980s with the `WaveLAN <http://en.wikipedia.org/wiki/WaveLAN>`_ proprietary wireless network. WaveLAN operated at 2 Mbps and used different frequency bands in different regions of the world. In the early 1990s, the IEEE_ created the `802.11 working group <http://www.ieee802.org/11/>`_ to standardize a family of wireless network technologies. This working group was very prolific and produced several wireless networking standards that use different frequency ranges and different physical layers. The table below provides a summary of the main 802.11 standards.
	French 0/7470 · 747 Needs editing
137 ../../protocols/wifi.rst:19
	English Frequency
	French 0/100 · 9 Needs editing
138 ../../protocols/wifi.rst:19
	English Typical throughput
	French 0/180 · 18 Needs editing
139 ../../protocols/wifi.rst:19
	English Max bandwidth
	French 0/130 · 13 Needs editing
140 ../../protocols/wifi.rst:19
	English Range (m) indoor/outdoor
	French 0/240 · 24 Needs editing
141 ../../protocols/wifi.rst:22
	English 802.11
	French 0/100 · 6 Needs editing
142 ../../protocols/wifi.rst:22 • ../../protocols/wifi.rst:24 • ../../protocols/wifi.rst:25
	English 2.4 GHz
	French 0/100 · 7 Needs editing
143 ../../protocols/wifi.rst:22
	English 0.9 Mbps
	French 0/100 · 8 Needs editing
144 ../../protocols/wifi.rst:22
	English 2 Mbps
	French 0/100 · 6 Needs editing
145 ../../protocols/wifi.rst:22
	English 20/100
	French 0/100 · 6 Needs editing
146 ../../protocols/wifi.rst:23
	English 802.11a
	French 0/100 · 7 Needs editing
147 ../../protocols/wifi.rst:23
	English 5 GHz
	French 0/100 · 5 Needs editing
148 ../../protocols/wifi.rst:23
	English 23 Mbps
	French 0/100 · 7 Needs editing
149 ../../protocols/wifi.rst:23 • ../../protocols/wifi.rst:25
	English 54 Mbps
	French 0/100 · 7 Needs editing
150 ../../protocols/wifi.rst:23
	English 35/120
	French 0/100 · 6 Needs editing
151 ../../protocols/wifi.rst:24
	English 802.11b
	French 0/100 · 7 Needs editing
152 ../../protocols/wifi.rst:24
	English 4.3 Mbps
	French 0/100 · 8 Needs editing
153 ../../protocols/wifi.rst:24
	English 11 Mbps
	French 0/100 · 7 Needs editing

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