Understanding Firewalls

These flashcards cover the key concepts and functionalities of firewalls as discussed in the lecture notes.

What is the basic function of a firewall?

Traffic filtering, organizing traffic according to a set of rules.

What are the three criteria used by simple firewalls to filter data?

Source, Destination, and Protocol.

What does 'Source' refer to in firewall traffic filtering?

Where the traffic originated from.

What does 'Destination' refer to in firewall traffic filtering?

Where the traffic is intended to go.

What does 'Protocol' refer to regarding firewall traffic?

The transport protocol that the traffic is using.

What is a hardware firewall?

A dedicated appliance or device that protects the entire network, installed at the edge of the network.

What is a software firewall?

A program or application installed on a computer that protects only that workstation or server.

What does a web application firewall do?

Helps protect web applications by filtering and monitoring traffic between the web app and the Internet.

Can Windows devices come with pre-installed firewall software?

Yes, Windows devices typically come with pre-installed firewall software.

Is it advisable to run two firewall applications at the same time?

No, it is best not to run two firewall apps simultaneously as they can conflict with each other.