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Associate Level Material
Appendix C
OSI Model Key Terms Table
Use the following 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 |The 1st layer of the OSI model is also its |The Physical layer changes packets of data |
| |bottom layer. This layer transmits and |to phsyical signals as 1's and 0's, and |
| |receives signals and specifies the physical|later, sends these signals to their |
| |details of cables, NICs, connectors, and |destination. |
| |hardware behavior. | |
|Data link layer |The 2nd layer of the OSI model. This layer |The data received from the network layer is|
| |is responsible for managing access to the |split into frames that can be transmitted |
| |network medium and delivery of data frames |by the physical layer. |
| |from sender to receiver or from sender to | |
| |an intermediate device, such as a router. | |
|Network layer |The 3rd layer of the OSI model. This layer |Network links are created, saved, and |
|...