7 layers of the OSI model

7 layers of the OSI model - T erm Function The lowest layer...

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Term Definition Function Physical Layer The lowest layer of the OSI model is the physical layer and is involved with the transmission and reception of the unstructured raw bit stream over a physical medium, describing the electrical/optical, mechanical, and functional interfaces to the physical medium. It also carries the signals for all of the higher layers. Its potential functions are data encoding, physical medium attachment, transmission technique, and physical medium transmission. Data Link Layer The data link layer provides error-free transfer of data frames from one node to another over the physical layer, allowing layers above it to assume virtually error-free transmission over the link. Its basic functions are link establishment and termination, frame traffic control, frame sequencing, frame acknowledgement, frame delimiting, frame error checking, and media access management. Network Layer The network layer controls the operation of the subnet and decides which physical path the
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This note was uploaded on 08/12/2011 for the course IT 240 taught by Professor Jamesmiller during the Spring '11 term at University of Phoenix.

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7 layers of the OSI model - T erm Function The lowest layer...

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