04-10-2010, 11:25 AM
firewalls.ppt (Size: 755.5 KB / Downloads: 144)
This article is presented by:
Neelam choudhary
IT(c-2)
Firewalls
+Sits between two networks
Used to protect one network from the other
It may be a hardware device or a software program running on a secure host computer
What does a firewall do?
-A firewall examines all traffic routed between the two networks to see if it meets certain criteria
-A firewall filters both inbound and outbound traffic.
-Firewalls can filter packets based on their source and destination addresses and port numbers.