Data Link Layer in OSI Model
Data link layer is the second layer of OSI model.It is responsible to make the physical layer error-free to the upper layer i.e network layer. It is also responsible for moving frames from one hop (node) to next. Data link layer are responsible for the following:
- Framing
- Physical addressing
- Flow Control
- Error Control
- Access Control
Why Flow Control is Used in Both Data Link Layer and Network Layer?
OSI model was established in1947 by international standard organization is a multinational body dedicated to worldwide agreement on international standards.ISO standard covers all the aspects of network communications is the Open System Interconnection model.It was introduced in the late 1070s. an open system is a set of protocols that allows any two different systems to communicate regardless of their underlying architecture.The purpose of the OSI model is to show how to facilitate communication between different systems without requiring changes to the logic of the underlying hardware and software.