Assignment 2

People interact directly with computer in many fields in our daily life. ICT help people in managing several sectors. But we have threats to computer such as viruses and natural disasters.


a. Name four main sectors that used ICT in their management.
- Education
- Banking
- Industry
- E-Commerce

b. State two differences between worms and viruses.
> Worms operates through the network, where as viruses spreads through any medium.
> Worms spreads copies of itself as a standalone programme, where as viruses spreads
copies of itself as a programme that attaches to other programme.


c. There are six types of security measures that can be used to protect our computer. Explain what is

i. Cytography

Cryptography is a process of hiding information by altering the actual information into different representation, for example, an APA can be
written as I? X.

Almost all cryptosystems depend on a key such as a
password like the numbers or a phrase that can be used to encrypt or decrypt a message.

The traditional type of cryptosystem used on a computer network is called a symmetric secret key system.


ii. Firewall

Firewall is a piece of hardware or software which functions in a networked environment to prevent some communications forbidden by the security
policy.

Firewall implement a security policy. It might permit limited access from in or outside the network perimeters or from certain user or for certain activities.