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FIREWALL
The term 'firewall' originally referred to a physical barrier designed to contain a fire or prevent
its spread within a building. In a computer, a firewall is a software or hardware-based network
security system that controls 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.
A firewall examines each 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.
Reb t
A computer virus is a ‘piece of code’ or program developed to corrupt data or program
files stored on a computer system.
Malware is a broad term for various types of malicious software designed to damage,
disrupt, or gain unauthorised access to a computer system.
The different types of malware are the worms, trojan horses, spywares, ransomware,
rootkits, and backdoors.
Antivirus software is a program designed to identify, prevent, and remove malware from
your computer.
A firewall is a software or hardware-based network security system that controls incoming
and outgoing network traffic according to a set of predefined rules.
OneOne Touch Learn Section A (Objective)
A. Tick (3) the correct option.
1. Which of the following is not a type of computer virus?
a. Macro Virus b. E-mail Virus
c. Boot Sector Virus d. Trojan Horse
2. What is another name for a program file virus?
a. File-infecting virus b. File injector virus
c. Both a and b d. None of these
3. What is Norton?
a. System Software b. Antivirus
c. Operating System d. All of these
Computer Virus 35

