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i + FIREWALL
The term 'firewall' originally referred to a physical barrier designed to contain a fire or prevent
its spread within a building. On a computer, a firewall is a software or hardware-based network
security system that controls the incoming and outgoing network traffic according to a set of
predefined rules. It acts as a gatekeeper and prevents unauthorised access to a computer
network. It inspects every data packet that arrives on the network and decides whether to
allow or block it based on these rules. Essentially, a firewall creates a barrier between a trusted
and secure internal network and an external network (such as the Internet) that is considered
untrusted and potentially insecure.
To Sum Up
A computer virus is a type of unwanted computer program which is developed by
individuals with an intention to infect the files of a computer, to corrupt a database or
to hamper the functioning of a computer system.
Malware is a broad term for various types of malicious software designed to damage,
disrupt, or gain unauthorized access to a computer system.
The different types of malware are the worm, trojan horse, spyware, ransomware,
rootkit and backdoor.
Antivirus software is a set of programs designed to identify, prevent, and remove
malware from your computer.
A firewall is a software or hardware-based network security system that controls the
incoming and outgoing network traffic according to a set of predefined rules.
Exercise
Section A (Objective)
A. Tick (3) the correct option.
1. Which virus can attack an executable file?
a. Program File Virus b. Boot Sector Virus
c. Macro Virus d. Email virus
2. Which of the following is a malware that gains administrator access to the host system?
a. Backdoor b. Rootkit
c. Ransomware d. Trojan Horse
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iPlus (Ver. 2.1)-VII

