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 |Transmits bits throughout the network’s |Changes data packets to physical signals |
| |physical medium. Performs services |which symbolize 1’s and 0’s and later sends|
| |requested by the data link layer. |physical signal to the destination |
|Data link layer |The Data link layer is in charge of |Splits data that is obtained from the |
| |transmitting data error free and to set up |network layer into frames the physical |
| |local links between two computers |layer can transmit. It also has packages |
| | |data into frames which are workable by the |
| | |network layer. |
|Network layer |Handles and routs procedures which allow |Creates keeps and closes network links |
| |data to be transferred from one network to |between networks. Makes routing selections |
| |another |and relays data from one network to |
| | |another. |
|Transport layer |Ensures error free delivery from one end to|Tackles mistakes correction, splitting data|
| |another |into small packets. Also reorders packets |
| | |if they arrive out of order. |
|Session layer |Used to complete administrative tasks and |Allows users to setup control and end a |
| |deals with safety |link. Also builds up checkpoints in data |
| | |streams in an attempt to avoid the need to |
| | |resend data packets lastly, this layer is |
| | |in charge of user authorization. |
|Presentation layer |Changes data from the application layer to |The main objective for this layer is to |
| |typical formats and semantics |change. Guarantees applications on |
| | |different ends of the network link can |
| | |communicate |
|Application layer |Responsible for the assistance of end user |The application layer starts connection |
| |application process |requests and offers an interface to access |
