Explain how digital signatures are used in the context of network security. What are the uses of digital signatures?

Explain the concept of Digital-to-Digital encoding. Sketch the Differential Manchester coding and RƵ encoding of the following bit stream:

Find CRC for the data polynomial  with the generator polynomial 

Explain different versions of the CSMA protocol. Also, explain the CSMA/CD with the help of diagrams.

Explain the TCP segment header with the help of a diagram. Explain the process of TCP connection establishment using a three-way handshake mechanism. Also, explain the TCP flow control with the help of an example.

Explain how digital signatures are used in the context of network security. What are the uses of digital signatures?

Explain the IEEE 802.11 protocol stack with the help of diagrams.

Explain one technique each for Analog to Digital modulation and Digital to Analog modulation with the help of diagrams.