3. Security [15 marks] A company is setting up a corporate net work with a DMZ. The company will run a public web server for use by customers, an email server for communication with customers, and a separate intranet web server for use only by employees. The company has a number of departments - sales, engineering, and production, each of which have their own file servers and their own network of PCs as individual subnets. (a) 10 marks] Draw a network design suitable for this company. Clearly label the segments and subnets, and show the routers and/or firewalls that are required in the network. Clearly show the locations of all the servers mentioned above and of the PCs belonging to each department. In this design, do not use NAT even il you think it would be a good idea. Write an explanation of the key features of your different network network design, and explain how you would configure the firewall(s) (b) [5 marks] After receiving your first network design proposal, the general manager requests that you include NAT so as to reduce the number of non-private IP addresses required. Sketch a modification to your network design, showing where you would place the NAT box. Write an explanation of how you would configure the NAT box to ensure that the network still delivered all the capabilities required by the company, and explain any assumptions that you are making. 3. Security [15 marks] A company is setting up a corporate net work with a DMZ. The company will run a public web server for use by customers, an email server for communication with customers, and a separate intranet web server for use only by employees. The company has a number of departments - sales, engineering, and production, each of which have their own file servers and their own network of PCs as individual subnets. (a) 10 marks] Draw a network design suitable for this company. Clearly label the segments and subnets, and show the routers and/or firewalls that are required in the network. Clearly show the locations of all the servers mentioned above and of the PCs belonging to each department. In this design, do not use NAT even il you think it would be a good idea. Write an explanation of the key features of your different network network design, and explain how you would configure the firewall(s) (b) [5 marks] After receiving your first network design proposal, the general manager requests that you include NAT so as to reduce the number of non-private IP addresses required. Sketch a modification to your network design, showing where you would place the NAT box. Write an explanation of how you would configure the NAT box to ensure that the network still delivered all the capabilities required by the company, and explain any assumptions that you are making