ASSIGNMENT 2

People interact directly with computers 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 4 main sectors that used in ICT in their management.

~ Education

~ Banking system

~ Industry

~ E-Commerce

b.State two differences between worms and viruses.

Worm ~Operates through the network

~Spread copies of itself as a stand alone program

Virus ~Spreads through any medium

~Spread copies of itself as a program that attaches to other program

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

a.Cryptography

* 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.

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