In this Video, Prakshi Agarwal, Assistant Professor(IT), Biyani Group of Colleges explains the communication system.In this video definition of communication is stataed along with the block diagram in which various componenets of communication system has been explained such as information source, electrial transducer,transmitter,medium and a receiver.

This is a part of lecture presented by Ms.Rashmi Sharma Asst.proffesor of Biyani girls college. The video is about cryptography And its importance in network security. In cryptography we send the message in encrypted form to the receiver. The aim of cryptography is to provide Authenticity, secrecy, non-repudiation. The video is helpful for BCA students.