Network Layer in OSI Model
Network layer is the third layer of OSI model.It is responsible for the delivery of individual packets from the source host to the destination host. Network layer is also responsible for the following:
- Logical Addressing
- Routing
- Packet Forwarding
- Fragmentation and Reassembly
- Quality of Services(QOS)
- Network Address Translation (NAT)
- Network Layer Security
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.