a) What types of addresses are contained in the layer 2, 3 and 4 headers? b) Name the protocol data unit encapsulated by a: (i) frame (ii) TCP segment (iii) IP datagram. c) Which of the following data units are not changed by a router? (i) frame (ii) application message (iii) TCP segment (iv) IP datagram. Match each of the following with one or more layers of the TCP/IP model: (a) Routing data across a network (b) Delivering data from a client application to a server application (c) Deliver a frame from one network interface card to the next (d) Transmitting and receiving electromagnetic signals (e) Flow control and congestion control. Suppose a computer is moved from a wired network in one location to a wireless network in another location. Does the physical address change? Does the IP address change? Do the port addresses change? Explain. Name all the layers of the TCP/IP stack that are implemented at the following devices: (a) switch (b) router. What is the difference between analog data and digital data? Give an example of each. In your own words, explain how the bandwidth of the transmission channel limits the number of bits that can be transmitted per second