SUBJECT : DATA COMMUNICATION AND COMPUTER NETWORKING

6. The below diagram in Figure 1 illustrates two home networks equipped with routers incorporating Network Address Translation (NAT). Figure 1 a) If host ( A ) is connected to the web server at host ( E ), provide the details for the address and port fields in the diagram for a standard packet sent by host ( A ). (2.5 Marks) b) Display the packet fields as they could appear upon reaching ( mathrm{E} ). (2.5 Marks) c) Suppose the user in the right-hand network wants to run a web server on host D. Provide the details for the address and port fields for a packet. (2.5 Marks) d) Assume host ( B ) connects to the web server at ( D ). Show the address and port field for a typical packet leaving host ( B ) to be delivered to ( D ). (2.5 Marks) [Total: 10 Marks]

6. The below diagram in Figure 1 illustrates two home networks equipped with routers incorporating Network Address Translation (NAT). Figure 1 a) If host A is connected to the web server at host E, provide the details for the address and port fields in the diagram for a standard packet sent by host A. (2.5 Marks) b) Display the packet fields as they could appear upon reaching E. (2.5 Marks) c) Suppose the user in the right-hand network wants to run a web server on host D. Provide the details for the address and port fields for a packet. (2.5 Marks) d) Assume host B connects to the web server at D. Show the address and port field for a typical packet leaving host B to be delivered to D. (2.5 Marks) [Total: 10 Marks]