Which osi layer provides file transfer services

The Physical Layer defines the electrical and mechanical aspects of interfacing to a physical medium for transmitting data, as well as setup, maintenance and disconnection of physical links.

The Data-Link Layer establishes an error-free communication path between network nodes over the physical channel, frames messages for transmission, checks the integrity of received messages, manages access to and use of the channel and ensures the sequence of transmitted data. The Network-Control Layer addresses messages, sets up the path between communicating nodes, routes messages across intervening nodes to their destinations and controls the flow of messages between nodes. The Transport Layer provides end-to-end control of a communication session once the path has been established, which enables the reliable and sequential exchange of data independent of both the systems that are communicating and their locations in the network. The Session Layer establishes and controls system-dependent aspects of communication sessions provided by the Transport Layer and the logical functions running under the operating system in a participating node. The Presentation Layer translates and converts transmitted encoded data into formats that can be understood and manipulated by users. The Application Layer supports user and application tasks and overall system management, including resource sharing, file transfers, remote file servers and database and network management. The OSI Model defines standard relationships between the hardware and software in today’s complex computer systems.Įach layer of the OSI Model provides specific services that contribute to overall network functioning. This translates into a set of rules that defines the way participating network nodes must interact to communicate and exchange information. In the OSI model the network architecture specifies a hierarchy of independent layers that contain modules for performing defined functions. Communication among these distributed systems and networks requires a standard approach to network design, one that defines the relationships and intersections between network services and functions via common interfaces and protocols.

Which osi layer provides file transfer services