Computer Security
a) Define computer security with its major types.
Answer: Computer security can be defined as the protection of computer system, data and software from heat, smoke, dust, water, virus, thieves, etc. for maintaining well working condition and increasing the life of computer devices.
Its major types are:
1) Hardware security
2) Software security
b) Write any four hardware security measures.
Answer: Any four hardware security measures are:
1) Protection from fire
2) Protection from theft
3) Protection from dust and dirt
4) Regular maintenance
c) Why is regular maintenance of hardware parts necessary?
Answer: The regular maintenance of hardware parts is very important and is a necessary measure to increase the working life of a computer. It helps to find our the problems in peripheral devices and repair them in time. It also helps to find the proper cause of any type of harm in computer system.
d) How can computers be protected from fire?
Answer: Computers can be protected from fire by making electric circuits, wiring systems, and using power protection devices to avoid short-circuit, and other fire arising troubles. Additionally, rooms can be equipped with fire extinguishers and fire alarm systems to reduce damage caused by fire at any time.
e) Write the use of UPS in computer system as major power protection device.
Answer: UPS is a commonly and widely used power protection device that provides battery backup automatically when required. This allows the users to save important data and information and prevent them from being lost or damaged.
Information Security
a) Define information security with its importance.
Answer: Information security can be defined as a sets of practices intended to keepp data secure from unauthorized access or alterations, both when it is being stored and when it is being transmitted from one machine or physical location to another.
Importance of information security are:
1) It protects the user’s privacy.
2) It prevents unauthorized access to the computer.
b) Mention any four information security threats.
Answer: Any four information security threats are:
1) Unauthorized access
2) Computer virus
3) Theft
4) Sabotage and Vandalism
c) What is malicious code? Write its any two forms.
Answer: Malicious code is the term used to describe any code in any part of a software system or script that is intedned to cause undesired effects, security breaches or damage to a system.
Any two forms of malicious codes are:
1) Pushed contents
2) Browser plug-ins
d) List any four information security mechanism.
Answer: Any four information security mechanism are:
1) Identification and authentication
2) Password
3) Firewalls
4) Antivirus software
e) Differentiate between encryption and decryption.
Answer: Following are the differences betwen encryption and decryption:
| Encryption | Decryption |
|---|---|
| Encryption is the conversion of data into a secret code. | Decryption is the conversion of encrypted data into its original form. |
| It takes place at the sender’s end. | It takes place at the receiver’s end. |
| Its major task is to conver the plain text into cipher text. | Its major task is to convert cipher text into plain text. |
f) What is anti-virus? Write any two examples.
Answer: Anti-virus is a utility software designed to protect the computer or network from computer viruses.
Any two examples are: Central Point Antivirus (CPAV) and Norton Antivirus.
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