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IT240_Appendix_C - Axia College Material Appendix C OSI...

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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. IT 240
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Term Definition Function (if applicable) Physical layer Responsible for transmissions of bits sent across a physical medium Transmits bits Data link layer Responsible for providing error-free data transmission and establishing local connections between two computers Divides data received from the network layer into distinct frames which can then be transmitted by the physical layer Network layer Concerned with the addressing and routing processes necessary to move data from one network to another Establishes, maintains, and terminates connections between networks Transport layer Middle layer which connects lower and upper layers Responsible for reliable transparent transfer of data between two points Session layer Allows remote users to establish, manage, and terminate a connection NA
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