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The Open Systems Interconnection (OSI) model (ISO/IEC 7498-1) is a product of the Open Systems Interconnection effort at the International Organization for Standardization . It is a prescription of characterizing and standardizing the functions of a communications system in terms of abstraction layers . Similar communication functions are grouped into logical layers. A layer serves the layer above it and is served by the layer below it. For example, a layer that provides error-free communications across a network provides the path needed by applications above it, while it calls the next lower layer to send and receive packets that make up the contents of that path.
OSI model
Technical stuff om kommunikasjon
Here's some technical information on data networking and communications for your perusal. A Glossary of Computer Oriented Abbreviations and Acronyms Networking Magazine http://www.data.com The Technology Super Site http://www.techweb.com/info/publications/ Information Technology "IT" & Internet & Computer related information This site is designed to be a help/support resource for Modem users of all ranges from beginners to advanced users http://www.modemhelp.org/ Networking technologies tutorials http://www.arcelect.com/Networking_Technologies_Tutorials_9-16-00.htm RS232 & Cable Diagrams info (how it works and spec. & pin outs) X.21 info (how it works and spec. & pin outs) RS422 info (how it works and spec. & pin outs) RS423 info (spec. & pin outs) RS485 info (how it works and spec. & pin outs) RS449 info (how it works and spec. & pin outs) RS530 info spec.
Kismet
Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and (with appropriate hardware) can sniff 802.11b, 802.11a, 802.11g, and 802.11n traffic. Kismet also supports plugins which allow sniffing other media such as DECT.
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Svitsjeprinsipper
Innholdet i denne siden og sidene som ligger under alle pekerene, skal du ha kjennskap til. Både lyd og bilde kan digitaliseres. Derfor er elektronisk kommunikasjon basert på overføring av digitale signaler. En kilde sender ut en strøm av informasjon.Home > Standards Dear customers, partners and friends, At Siemon, we believe industry standards help you achieve the most out of your networks.
Network Cabling Standards Guide, By Siemon
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