Class -6th
Lesson- 9 Cyber Threats and security
Page :-133
1. Virus
2. Melissa and Concept.
3. Polymorphic virus
4. Trojan Horse
Page:- 138
A. tick the correct answers
1. Malware
2. Fast proceessing speed.
3. Dark Avenger
4. Cookies
5. Cookies
B. Fill in the blanks
1. Virus
2. encrypt
3. Spam
4. anti- malware
5. portect
C. True or false
1. False
2. False
3. False
4. False
5. True
Answer the following
Q.1 What do you understand by cyber threats ? Mention some cyber threats.
Ans:- Cyber threat refers to the malicious attempt to damage or distrupt a computer network or system, stealing someone's intellectual property,identity or money.
1. Stealing and deleting data or information.
2. Monitoring end user's computer activities without their consent.
Q.2 Define the term maleware. List any three careers through which malware can be enter into a computer.
Ans:- The term where is formed by the combination of two words - malicious and software. Malicious means harmful and software is a program.
1. Through e-mail attachment
2. By downloading or installing
3. Through an infected pen drive or CD/DVD.
Q.3 What is virus? List some tips to prevent a virus infection.
Ans:- Computer VIRUS stands for Vital Information Resource Under Siege. Virus is one of the most widely known kind of malware. It is designed to replicate and spread. It is a malicious programs or piece of code that enters into the computer without the knowledge of end users.
To prevent from virus:
1. Install effective and advanced antivirus software.
2. Scan the computer from time to time.
3. It is a good practice to scan a pen drive before transferring data
Q.4 What is firewall? What role does it play?
Ans:- Firewall is a security system that protects a computer from an unauthorised access over a network or internet. Fire firewall could be emplimented as a hardware of software or even a combination of both. Fibre software follows a set of rules that determine what can enter and leave a network.Firewall is highly secure security system it is used to secure our file or data .
Q.5 What are cookies?
Ans:- A cookies small file that is automatically sent by a website to the ends user computers through a web browser whenever it is connected to the same websites.
👉👉You want to login your account you will find that the require website opens with your email id display on the screen has its saved your time to re-enter the email ID.
Cookies basically customers the web page for a user as per their personal interest therefore cookies are harmless files.
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