Problem:
(a) What do you meant by Network Address Translation (NAT)? Why is it used?
(b) Given the following information by your ISP about your newly acquired Frame Relay connection with public IP range: 202.123.21.120 /30 You are required to design a network which constitutes of a LAN having 3 subnets (with Internet connectivity) for each department in your company.
Each subnet is assumed to have each a maximum of 28 hosts including a file server and an internal web server.
Note: You must use an internal Class C addressing scheme.
Draw the network layout and giving maximum information about:
• IP, Subnet Mask & Gateway addresses of all devices and servers and 1 host from each subnet.
• Type and hierarchy of hardware devices, transmission media and network topology you might adopt, with justifications, where necessary.