question 1 define the following

Question

Question 1 Define the following terms
                                  1) Analog Signals and Digital Signals 2) Composite signals

Question 2 Define the following terms
                                  1) Bandwidth 2) Composite Signals 3) Analog Signals 4) Digital Signals 5) Periodic Analog Signals

Question 3 Explain the TCP/IP Reference Model with diagram

Question 4 What are the advantages and disadvantages of layered architecture in a network?

Question 5 What are the problems due to which transmission lines suffers?

Question 6 Differentiate between circuit switching and message switching