OSI Model

OSI Model for Cisco CyOps Associate

**7 - Application**

contains protocols used for process-to-process communications.

6 - Presentation

provides for common representation of the data transferred between application layer services.

5 - Session

provides services to the presentation layer to organize its dialogue and to manage data exchange.

4 - Transport

defines services to segment, transfer, and reassemble the data for individual communications between the end devices.

3 - Network

provides services to exchange the individual pieces of data over the network between identified end devices.

2 - Data Link

describe methods for exchanging data frames between devices over a common media

1 - Physical

protocols describe the mechanical, electrical, functional, and procedural means to activate, maintain, and de-activate physical connections for a bit transmission to and from a network device.