It 240 Key Terms Table

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.
| | |Function |
|Term |Definition |(if applicable) |
|Physical layer |Is responsible for the actual transmissions|Physical Layer Transmits the bits. |
| |sent across a physical medium. | |
|Data link layer |Is responsible for providing error-free |It divides data it receives from the |
| |data transmission also establishes local |network layer into distinct frames that can|
| |connections between two computers or hosts.|be transmitted by the physical layer. |
|Network layer |Is concerned with the addressing and |Establishing, maintaining, and terminating |
| |routing processes necessary to |connections between networks, making |
| |move data (known as packets or datagram's) |routing decisions, and relaying data from |
| |from one network (or subnet) to another. |one network to another. |
|Transport layer |The middle layer that connects the lower |Responsible for reliable transparent |
| |and upper layers together. |transfer of data |
|