Network Geography-April 1

network geography

hello wireless!

Wireless History

Information and Packets

Snoopin

James Clerk Maxwell proved mathematically that electromagnetic waves should exist.

Heinrich Hertz was the first to generate them

In the 1880s Hertz demostrated how to produce these waves by using a spark gap

But their transmission power was limited.

In the early 1890s Guglielmo Marconi developed the first wireless telegraph system

Shannons theory made it possible to quantify information.

This is one of the big factors that led to the digital revolution.

Early digital communications piggy backed on existing telephone and telegraph infrastructure

It also allowed the compression of data into discrete packets that can be sent over the network.

First came circuit switching which automated the switch board.


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  60 03 08 93 6B BA E8 DE 27 C4 07 23 08 00 45 00 01 2D 2D 67 40 00 37 06 CA 3F 4A D9 3F 3D C0 A8
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  01 00 00 00 00 2C 00 00 00 00 01 00 01 00 80 FF FF FF 00 00 00 02 02 44 01 00 3B


	HTTP/1.1 200 OK
	Connection: close
	Content-Type: image/gif
	Cache-Control: private, no-transform, max-age=604800
	Expires: Sat, 04 Apr 2015 21:36:32 GMT
	Content-Length: 35
	Date: Sat, 28 Mar 2015 21:36:32 GMT
	Server: QS

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