Teleteknikk. OSI model. Model with 7 layers to describe communications systems The Open Systems Interconnection model (OSI model) is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to its underlying internal structure and technology. Its goal is the interoperability of diverse communication systems with standard protocols. The model partitions a communication system into abstraction layers. The original version of the model defined seven layers. A layer serves the layer above it and is served by the layer below it. The model is a product of the Open Systems Interconnection project at the International Organization for Standardization (ISO). Communication in the OSI-Model (example with layers 3 to 5) History[edit] In the late 1970s, the International Organization for Standardization (ISO) conducted a program to develop general standards and methods of networking.
Description of OSI layers[edit] Layer 1: Physical Layer[edit] Internetworking Technology Handbook [Internetworking. Kategori:Kommunikasjonsteknologi. Technical stuff om kommunikasjon. Ethernet ramme mm. Kismet. Hjemmeside for Telemator og MX Data. TCP/IP Protocol Sequence Diagrams. Table Of Contents. I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :) If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.
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Social Net. Torrents. Wireshark: The World's Most Popular Network Protocol Analyzer. EtherApe, a graphical network monitor. 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. Mange kilder med info-strøm skal behandles samtidig og overføres til mottaker så raskt som mulig. For å kunne skape en effektiv info-strøm, må info fra hver kilde deles i enheter. Figuren nedenfor viser i prinsippet hvordan enheter fra forskjellige kilder overføres på samme linje. Multipleksing er ikke en enkel metode eller prinsipp, men en samlebetegnelse på metoder og prinsipper som gjør det mulig å overføre mange signaler (telefonsamtaler, datafiler, bilder, video, ...) samtidig på en felles overføringskanal.
Det skilles mellom to fundamentalt forskjellige priunsipper for multipleksing: frekvensdelt multipleksing (FDM) og tidsdelt multipleksing (TDM). Det er mulig å kombinere tids- og frekvensdelt multipleksing . Windows Server 2003, Longhorn Server & Vista Networking Articles. Network Cabling Standards Guide, By Siemon. Home > Standards Dear customers, partners and friends, At Siemon, we believe industry standards help you achieve the most out of your networks. For this reason, we have put together a guide to network cabling and data center standards. We are pleased to introduce: Standards Informant.
Standards Informant is a new website covering a wide range of standards topics including twisted-pair cabling, fiber optic cabling, data center standards, pathways and spaces, bonding and grounding, industrial premises standards, building automation systems, energy efficiency and a whole lot more. We hope you enjoy the new Standards Informant website. Thanks, - All of Us at Siemon Standards Update Learn what's going on in with standards development with this Industry Standards Activity Overview of activites in TIA, IEEE, ISO/IEC JTC 1/SC 25/WG 3 (Customer Premises Cabling), IEC SC 48B (Connectors), and BISCI. »Download PDF Shielded Copper Cabling Resource Center »Shielded Cabling Resource Center »Full Article »More.