Question

Q1. With reference to OSI model, discuss various steps involved if User A wants to communicate with a
User B. Also discuss the need for layering in network architecture.

Answer 1

Answer:

The Open Systems Interconnection (OSI) Reference Model is a conceptual framework that describes functions of the networking or telecommunication system independently from the underlying technology infrastructure. It divides data communication into seven abstraction layers and standardizes protocols into appropriate groups of networking functionality to ensure interoperability within the communication system regardless of the technology type, vendor, and model.

Explanation:

Network

The third layer of the OSI model organizes and transmits data between multiple networks.

The network layer is responsible for routing the data via the best physical path based on a range of factors including network characteristics, best available path, traffic controls, congestion of data packets, and priority of service, among others. The network layer implements logical addressing for data packets to distinguish between the source and destination networks.

Answer 2

Explanation:

OSI stands for open systems interconnection. It is a communication protocol that has seven layers of networking. The transmission or communication of data between different ports or users is done in the third layer. When a user A wants to send data, it will request data and send it over the network with the destination port address. The network will then route data keeping in view existing data traffic