Question

Short Paper: Firewalls and Intrusion Detection Systems
Both firewalls and intrusion detection systems are used to monitor network traffic and implement network security policies. Research these technologies and determine how they are similar and how they differ. Are both needed? Explain your answer in a short paper.

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Firewalls are network devices with security roles that are implemented to ensure the boundary defense (between the local network and external network residing on each side of the gateway). IDS can be deployed to monitor a single host (HIDS) or a network segment (NIDS). Because none of the two technologies suffices for achieving complete network protection, it is a common practice to integrate them in the same defense plan that follows multi-layered organization (e.g. defense-in-depth)....

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