as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
describe the layering of the osi model.
user
the osi model consists of seven different layers, each responsible for a different part of the data transmission process. the layers are organized in a hierarchy, with each layer having a specific purpose and each proposing protocols to fulfill that purpose. 
the first layer is the physical layer, which deals with the transmission of raw data between devices.
the second layer, the data link layer, is responsible for providing error-free transmission and physical addressing of the data.
the third layer is the network layer, which is responsible for the routing of data packets between different networks.
the fourth layer is the transport layer, which provides the necessary data flow control.
the fifth layer is the session layer, which deals with the establishment, maintenance and synchronization of connections.
the sixth layer is the presentation layer, which deals with encoding and formatting of data.
the seventh layer is the application layer, which is the layer that provides user access to network services.
assistant