4. What is a firewall?
ANSWER
A firewall is a device that serves as a barrier between networks providing access control, traffic filtering, and other security features. Firewalls are commonly deployed between trusted and untrusted networks, for example between the Internet (untrusted) and an organization’s trusted private network. They can also be used internally to segment an organization’s network infrastructure, for example; deploying a firewall between the corporate financial information and the rest of the company network. Firewalls are additional security mechanisms that should be included in all networks, both wired and wireless, in addition to being implemented on client devices as software applications. With the increased risks that are associated with wireless networks, it is important to include firewalls and other security mechanisms during the design phase.
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