problem 1: What is the basic difference between circuit switching and the packet switching?

problem 2: A message is broken up into three pieces. Describe transmission of the packets by using datagram approach to the packet switching?

problem 3: A message is broken up into three pieces. Describe transmission of the packets by using a permanent virtual circuit?

problem 4: A message is broken up into three pieces. Describe transmission of the packets by using a switched virtual circuit?

problem 5: Why has message switching been swapped by other switching methods?

problem 6: How many cross points are required if we use a crossbar switch to join 1000 telephones in a small town?

problem 7: Find out the number of cross points required from the data given below:

Stage 1: Four 4-input 3-output cross bar switches.
Stage 2: Three 4-input 4-output cross bar switches with the inputs to each switch. Being the output from each cross bar switch of the preceding stage.
Stage 3: Four 3-input 4-output cross bar switches with inputs to each switch being. The output from each switch of the preceding stage.

problem 8: What is the relationship between the band-width of a signal before and after it has been encoded by using spread spectrum?

problem 9: List the advantages of the spread spectrum.

problem 10: What do you mean by frequency-hopping spread spectrum?