PARTA QUESTION 1 (a) Explain TWO (2) principles of protocol layering in data communication [4 marks) (b) Match the following tasks to layer of TCP/IP protocol suite (i) Route determination Connection to transmission media (ii) Providing services for the end user (iv) Creating user datagrams (v) Responsibility for handling frames between adjacent nodes (vi) Transforming bits to electromagnetic signals [6 marks) (c) One goal in data communication is to increase the data rate while decreasing the signal rate. Give your opinion to this statement. [4 marks) (d) (d) Assume eight devices are arranged in a mesh topology. How many cables are needed? How many ports are needed for each device? [3 marks)