List three design goals for a firewall.
List four techniques used by firewalls to control access and enforce a security policy.
What information is used by a typical packet filtering firewall?
What are some weaknesses of a packet filtering firewall?
What is the difference between a packet filtering firewall and a stateful inspection firewall?
What is an application-level gateway?
What is a circuit-level gateway?
What are the common characteristics of a bastion host?
Why is it useful to have host-based firewalls?
What is a DMZ network and what types of systems would you expect to find on such networks?
What is the difference between an internal and an external firewall?

Question-2 : In no less than 250 words, explain the difference between an access control list (ACL) that is used in routers to block traffic and firewalls. What similarities do they share?

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