Network Security Threats: Types, Impact, and Prevention

Question 1

Which of the following is NOT a type of malware?

Accepted Answer

Antivirus Software

Answer

Viruses

Answer

Spyware

Answer

Worms

Question 2

What is the primary goal of a virus?

Accepted Answer

To disrupt normal system operations

Answer

To steal personal information

Answer

To create a backdoor for remote access

Answer

To encrypt files for ransom

Question 3

Which type of network attack involves the attacker pretending to be a trusted entity to gain access to a system?

Accepted Answer

Man-in-the-middle

Answer

Phishing

Answer

DDoS

Answer

SQL injection

Question 4

What is the main purpose of a firewall?

Accepted Answer

To prevent unauthorized access to a network

Answer

To detect and remove viruses

Answer

To encrypt data before sending it over a network

Answer

To monitor network traffic for suspicious activity

Question 5

Which of the following is a key objective of network security risk assessment?

Accepted Answer

Identifying potential vulnerabilities and threats

Answer

Developing and implementing security measures

Answer

Monitoring and analyzing network traffic

Answer

Training employees on security best practices

Question 6

What is the purpose of network segmentation?

Accepted Answer

To divide a network into smaller, isolated segments

Answer

To provide redundant paths for data transmission

Answer

To improve network performance and efficiency

Answer

To simplify network management and troubleshooting

Question 7

What is the primary purpose of network access control (NAC)?

Accepted Answer

To enforce security policies and restrict access to network resources

Answer

To detect and respond to network intrusions

Answer

To encrypt network traffic to protect sensitive data

Answer

To provide secure remote access to network services

Question 8

Which of the following is a type of malware that disguises itself as something legitimate to gain access to a computer system?

Accepted Answer

Trojan horse

Answer

Virus

Answer

Worm

Answer

Spam

Question 9

Which type of network attack involves sending a high volume of traffic to overwhelm a network?

Accepted Answer

Denial-of-service

Answer

Phishing

Answer

Man-in-the-middle

Answer

SQL injection

Question 10

What is the primary distinction between a physical and a virtual network?

Accepted Answer

Physical networks use tangible cables, while virtual networks use software

Answer

Virtual networks are more secure than physical networks

Answer

Physical networks provide higher speeds than virtual networks

Answer

There is no difference between physical and virtual networks

Question 11

Which protocol is commonly used for secure web browsing?

Accepted Answer

HTTPS

Answer

TCP

Answer

UDP

Answer

FTP

Question 12

What is the primary function of a network intrusion detection system (IDS)?

Accepted Answer

To detect and alert about potential security threats

Answer

To prevent network attacks

Answer

To encrypt network traffic

Answer

To provide remote access to a network

Question 13

What is a primary consequence of a successful hacking attack on a network?

Accepted Answer

Data loss or theft

Answer

Permanent hardware damage

Answer

Increased network bandwidth consumption

Question 14

Why is encryption essential for network security?

Accepted Answer

It makes transmitted data unreadable without the correct key.

Answer

It significantly slows down network performance.

Answer

It only protects against malware attacks.

Answer

It's not necessary for secure network communication.

Question 15

Which of the following is a common type of malware that encrypts files and demands a ransom payment to decrypt them?

Accepted Answer

Ransomware

Answer

Phishing

Answer

Spyware

Answer

Adware

Question 16

What is the term for unauthorized access to a computer system?

Accepted Answer

Hacking

Answer

Phishing

Answer

Cracking

Answer

Spoofing

Question 17

What is the primary purpose of a firewall?

Accepted Answer

To block unauthorized access to a network

Answer

Monitor network traffic

Answer

Detect and remove viruses

Answer

Encrypt data

Question 18

What is the key difference between a virus and a worm?

Accepted Answer

A virus needs a host file to replicate, while a worm can replicate on its own

Answer

A worm is spread through email, while a virus is spread through USB drives

Answer

A virus is more destructive than a worm

Question 19

Which of the following is a type of denial-of-service attack?

Accepted Answer

SYN flood

Answer

Phishing

Answer

Malware

Answer

Man-in-the-middle attack

Question 20

What is the primary purpose of a honeypot?

Accepted Answer

To attract and deceive attackers

Answer

Monitor network traffic

Answer

Detect and remove viruses

Answer

Block unauthorized access to a network

Question 21

Which of the following is a best practice for protecting against phishing attacks?

Accepted Answer

Hover over links to verify their destination

Answer

Open attachments from unknown senders

Answer

Click on links in any email

Question 22

What is the role of a network security scanner?

Accepted Answer

To scan networks for vulnerabilities

Answer

Block unauthorized access to a network

Answer

Detect and remove viruses