A Network Address Translation (NAT) gateway/router does have some…
Question A Network Address Translation (NAT) gateway/router does have some… A Network Address Translation (NAT) gateway/router does have some similar properties to a firewall. Describe the Network Address (Port) Translation (NA(P)T) table used in a NAT router, e.g. for a home broadband router or an enterprise network between a private sub network and a corporate network. In your answer briefly describe how the NAPT function works and the key components provided in a NAT gateway. [6 marks] Explain how NAT is not equivalent to a firewall and thus fails as a security device. [2 marks]For parts (b) to (e) below, consider the following network diagram and packet filtering ruleset where 192.168.1.0 refers to the subnet 192.168.1/24 which consists of some hosts that perform services in a demilitarized zone (DMZ) and the rest of the devices are computer hosts or servers in a small/medium sized organization which has domain name smallorg.co.uk. Figure Q1. Partial network diagram. Describe the purpose and effect of rulesets 1, 4, and 5 . [3 marks] Consider rulesets 2 and 3. Explain why these are important. [3 marks] Discuss how VLANs could be used to effectively segment the internal network of smallorg.co.uk. Show this in a diagram and explain how you would subnet the IP addresses and how traffic would be routed between hosts on different VLANs. [6 marks] What is the importance of IP ingress and egress filtering in the Internet? In your answer particularly identify what the ISP would be filtering with respect to IP packets from smallorg.co.uk and from the network providers attached to the ISP. [5 marks] Computer Science Engineering & Technology Information Security COMPUTER S IY5501J Share QuestionEmailCopy link Comments (0)
