However, there can also be interception, alteration and retransmission of the data, by braking the line of communication, and passing it through the attacker. 2.8: Viruses and worms: These are the most popular means of attacking and the primal fear of many mainframes as well as private computers. ... When the user runs the program in his computer, the virus or worm becomes active. ... The internal network is also protected, because the firewall does not allow any connections to be initiated from an external network to the internal network. 3.2: Firewalls A firewall is a combin...

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• Grade Level: Undergraduate