Question

1. List three primary goals of a firewall, and explain why each goal is important.

2. Describe a three-tier architecture, and explain why this architecture is considered a best-practice.

3. Explain how you would architect a network that includes the servers listed below. How many different tiers would you include, and where would you place the firewalls? What is the purpose of each tier (what are you protecting, or what risk are you mitigating)?

a. Web server
i. Must be accessible from the Internet

b. Application server
i. Must be accessible from Web server

ii. Must be able to access Database and Credential store c. Database server

i. Must be accessible from Application server d. Credential store (e.g. Active Directory)

i. Must be accessible from Application server

Answer 1

Please Note:
As per the Chegg Answering Guidelines, I have answered the first question. Please Re-post for the other Questions.

Q1.
Answer)
A Firewall is a security system hardware or software which controls the incoming and outgoing traffic to and from a PC or systems and thus analyzes the traffic based on the existing security rules and implements those rules on the traffic.
It is a tool which can assist IT professionals with the security of data and networks. A Firewall is a security system hardware or software which controls the incoming and outgoing traffic to and from a PC or systems and thus analyzes the traffic based on the existing security rules and implements those rules on the traffic. Firewall is a barrier between the trusted and untrusted network. Firewalls protect the trusted network and its resources from the outside unsafe and untrusted network such as the Internet.
The firewall will control the access control to assets by maintaining users access to the resources inside the organization and will also separate the internal and "trusted" resources from external and "semi-trusted" servers.
A firewall policy which controls the policy of the implementation of the firewall in the organization is created by:
a) Identifying all the requirements of the firewall
b) Creating rule-sets for implementing the firewall policy and firewall performance
c) Managing the firewall policies, architectures, software and other components throughout the life cycle of the firewall.
A firewall is useful to an organization with regard to resources which the organization wants to make publicly available (such as a web server) where the organization plans to grant public access and thus to protect the resources from being attack proof and hack proof the firewall has to be established. Also, the organization's internal resources have to be protected against the outside attacks and thus firewalls are important in web servers as well.