What is firewall and how it helps to protect the network

1. What is firewall and how it helps to
protect the network?
Trainee
Hussam mohammed - 439128026
Instructor
ENG.Ibrahim AL-Adini

2. First lets talk about the concept of the firewall

3. Firewalls types
Packet-filtering firewalls:
Stateful inspection firewalls:
Application-level gateways (a.k.a. proxy firewalls):
Circuit-level gateways:

4. software and hardware firewalls
Software firewalls:
Hardware firewalls:

5. Do you need firewall if you have antivirus?

6. Difference Between Firewall and Antivirus

7. References
computer.howstuffworks.com/firewall1.htm
https://kb.iu.edu/d/aoru
https://www.webopedia.com/TERM/F/firewall.html