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physical carrier

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  • Carrier sense multiple access with collision avoidance — In computer networking, CSMA/CA belongs to a class of protocols called multiple access methods. CSMA/CA stands for: Carrier Sense Multiple Access With Collision Avoidance.In CSMA, a station wishing to transmit has to first listen to the channel… …   Wikipedia

  • Carrier sense multiple access — (CSMA) is a probabilistic Media Access Control (MAC) protocol in which a node verifies the absence of other traffic before transmitting on a shared physical medium, such as an electrical bus, or a band of electromagnetic spectrum. Carrier Sense… …   Wikipedia

  • Carrier Ethernet — Carrier Ethernet: the extensions to Ethernet necessary to enable telecommunications network providers ( common carriers in US industry jargon) to provide Ethernet services to customers and to utilise Ethernet technology in their… …   Wikipedia

  • Physical layer — PHY redirects here. For the drug referred to as Phy, see Methadone. The OSI model 7 Application layer 6 Presentation layer 5 Session layer 4 Transport layer 3 …   Wikipedia

  • Physical Layer — NOTOC The Physical Layer is the first level in the seven layer OSI model of computer networking. It translates communications requests from the Data Link Layer into hardware specific operations to affect transmission or reception of electronic… …   Wikipedia

  • Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …   Universalium

  • carrier — /kar ee euhr/, n. 1. a person or thing that carries. 2. an employee of the post office who carries mail. 3. a person who delivers newspapers, magazines, etc., on a particular route. 4. Transp. a. an individual or company, as a railroad or… …   Universalium

  • Carrier generation and recombination — In the solid state physics of semiconductors, carrier generation and recombination are processes by which mobile electrons and electron holes are created and eliminated. Carrier generation and recombination processes are fundamental to the… …   Wikipedia

  • Physical Layer — Als OSI Modell (auch ISO OSI Schichtmodell, OSI Referenzmodell; engl. Open Systems Interconnection Reference Model) wird ein Schichtenmodell der Internationalen Standardisierungsorganisation (ISO) bezeichnet. Es wurde als Designgrundlage von… …   Deutsch Wikipedia

  • carrier DNA — DNA of undefined sequence which is added to the transforming (plasmid) DNA used in physical DNA transfer procedures. This additional DNA increases the efficiency of transformation in electroporation and chemically mediated DNA delivery systems.… …   Glossary of Biotechnology

  • E-carrier — In digital telecommunications, where a single physical wire pair can be used to carry many simultaneous voice conversations by time division multiplexing, worldwide standards have been created and deployed. The European Conference of Postal and… …   Wikipedia

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