OSI+Model+Key+terms[1][1] - Axia College Material Appendix...

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Axia College Material Appendix C OSI Model Key Terms Table Use the table to define the key terms related to the OSI Model. Describe the functions of any hardware connectivity devices and tools listed. Term Definition Function (if applicable) Physical layer Physical part of a network. Lower Layer of OSI Model Actually transmits bits over a physical medium (NIC card) It allows signals, such as electrical signals, optical signals, or radio signals, to be exchanged among communicating machines Data link layer Responsible for the transfer of data over a channel Sends frames; turns received bits into frames Defines the station address (physical); provides link management Provides error detection across the physical segment Network layer Responsible for the addressing and routing between sub-networks Forms internetwork by providing routing functions Defines end-to-end addressing (logical _ Net ID _Host ID) Provides connectionless datagram services Transport layer Ensures end to end error free delivery Breaks up blocks of data on send or reassembles on receive Has end-to-end flow control and error recovery Provides a distinct connection for each session Session layer Performs administrative tasks and security Establishes sessions between services Handles logical naming services
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OSI+Model+Key+terms[1][1] - Axia College Material Appendix...

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