Chapter 4, Problem 36SG

Explanation of Solution

Functions of personal firewall, hardware firewall, antivirus program, malware removers, and Internet filters:

Personal firewall:

• It is a network security tool and its function is to find and protect computers and all its information from unauthorized intrusions.
• It regularly monitors all the communication happens to and from the computer.
• If any intrusions occur, then the personal firewall informs the user by giving a message.
• Example: If the user downloads any software or any file from the Internet, and if that file contains virus; then the firewall instructs the user that the file contains virus and warns to discard that file.
• Example of personal firewall is Comodo firewall.

Hardware firewall:

• It is a device and its function is to stop the network interruptions before they try to affect the computers.
• Routers also acts as a hardware firewall.
• Hardware firewall uses packet filtering method in order to examine the header of the packet that contains source and destination.
• Example of hardware firewall is Cisco SA 500...