1) Write down the responsibilities of data link layer.
2) Write down the types of errors.
3) Describe in detail the data transmission in OSI reference model.
4) What do you mean by redundancy?
5) Write down the available detection methods.
6) Write detailed notes on VRC.
7) Write detailed notes on LRC.
8) Write detailed notes on CRC.
9)a) Write down the four properties by which transmission media can differ.
b) Three packet switching networks each have n nodes. Networks has a star topology with central switch, a ring respectively and a third is fully interconnected with wire form every node to every other node. Determine the best, average and worst case transmission paths in hops?
10) Explain the main elements of protocols and the standards.