Network Security Threats and Vulnerabilities: Master Network Security

Question 1

What type of network security threat involves flooding a website or network with excessive traffic to disrupt its operations?

Accepted Answer

Denial-of-service attack

Answer

Malware attack

Answer

Phishing attack

Answer

Man-in-the-middle attack

Question 2

Which of the following is a security measure that restricts access to network resources based on predefined criteria?

Accepted Answer

Authorization

Answer

Encryption

Answer

Authentication

Answer

Firewall

Question 3

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

Accepted Answer

To monitor network traffic for suspicious activity

Answer

To prevent network attacks

Answer

To encrypt sensitive data

Answer

To authenticate users

Question 4

What is the purpose of a demilitarized zone (DMZ) in a network security architecture?

Accepted Answer

To isolate internal network segments from untrusted networks

Answer

To provide a secure area for external servers

Answer

To filter out malicious traffic

Answer

To authenticate users

Question 5

Which of the following is a major network security risk associated with wireless networks?

Accepted Answer

Unauthorized access

Answer

Malware infections

Answer

Phishing attacks

Answer

Data breaches

Question 6

What is the primary goal of network security monitoring?

Accepted Answer

To identify and respond to security incidents

Answer

To prevent network outages

Answer

To optimize network performance

Answer

To manage user access permissions

Question 7

Which type of malware encrypts files and demands a ransom payment?

Accepted Answer

Ransomware

Answer

Phishing

Answer

Adware

Answer

Trojan horse

Question 8

What is the primary aim of a phishing attack?

Accepted Answer

To impersonate a trusted entity and collect sensitive data

Answer

To exploit software vulnerabilities

Answer

To disrupt network services

Answer

To encrypt files and demand a ransom

Question 9

Which network security attack aims to make a server or network unavailable by overwhelming it with excessive traffic?

Accepted Answer

Denial-of-service (DoS)

Answer

Buffer overflow

Answer

Cross-site scripting

Answer

SQL injection

Question 10

In terms of network security, what is the purpose of a firewall?

Accepted Answer

To filter incoming and outgoing network traffic

Answer

To detect and remove malware

Answer

To prevent unauthorized network access

Answer

To encrypt sensitive data

Question 11

What is a crucial element of a strong password policy?

Accepted Answer

Requiring a combination of uppercase, lowercase, and special characters

Answer

Allowing the use of common phrases that are easy to remember

Answer

Setting frequent password expiry intervals

Answer

Permitting password sharing

Question 12

Which type of malware encrypts files and demands ransom payments?

Accepted Answer

Ransomware

Answer

Virus

Answer

Trojan horse

Answer

Worm

Question 13

Phishing attacks often trick users into providing sensitive information by:

Accepted Answer

Sending emails that appear to come from legitimate sources

Answer

Exploiting vulnerabilities in web browsers

Answer

Intercepting network traffic

Answer

Launching denial-of-service attacks

Question 14

The primary goal of denial-of-service attacks is to:

Accepted Answer

Disrupt the availability of a service

Answer

Steal sensitive data

Answer

Infect computers with malware

Answer

Gain unauthorized access to networks

Question 15

In computer networks, a vulnerability refers to:

Accepted Answer

A weakness that can be exploited by attackers

Answer

A type of malware that spreads through email

Answer

A method to identify and block phishing emails

Answer

A protocol for secure communication over networks

Question 16

To mitigate malware infections, it is recommended to:

Accepted Answer

Install and update antivirus software

Answer

Use weak passwords

Answer

Avoid backing up important data

Answer

Disable network intrusion detection systems

Question 17

Firewalls in network security primarily function to:

Accepted Answer

Restrict unauthorized access to and from a network

Answer

Detect and remove malware

Answer

Identify and respond to intrusion attempts

Answer

Secure data transmission

Question 18

Intrusion detection systems (IDS) are beneficial because they provide:

Accepted Answer

Real-time alerts of potential attacks

Answer

Automated blocking of malicious traffic

Answer

Exclusive prevention of unauthorized access

Answer

Comprehensive removal of malware

Question 19

The key responsibility of a network administrator in network security is to:

Accepted Answer

Identify and address threats and vulnerabilities

Answer

Install and maintain security software exclusively

Answer

Educate users about security practices only

Answer

Respond to security incidents solely

Question 20

When securing passwords, it is essential to:

Accepted Answer

Create long and complex passwords

Answer

Reuse passwords across multiple accounts

Answer

Share passwords with trusted colleagues

Answer

Store passwords in easily accessible text files

Question 21

Which of the following is a type of malware that displays unwanted advertisements?

Accepted Answer

Adware

Answer

Worm

Answer

Virus

Answer

Trojan horse

Question 22

What is the most crucial step in preventing phishing attacks?

Accepted Answer

Educating users about phishing techniques.

Answer

Installing antivirus software

Answer

Creating strong passwords

Answer

Using a VPN

Question 23

Which type of attack aims to flood a network with excessive requests, rendering it inaccessible?

Accepted Answer

Denial-of-service (DoS)

Answer

Buffer overflow

Answer

Man-in-the-middle

Answer

SQL injection

Question 24

What is the primary function of a vulnerability scanner?

Accepted Answer

Identifying potential security weaknesses in a network.

Answer

Detecting and removing malware

Answer

Preventing unauthorized access to the network

Question 25

Which security risk is commonly associated with cloud computing environments?

Accepted Answer

Data breaches due to shared infrastructure.

Answer

Increased latency

Answer

Increased costs

Answer

Reduced scalability

Question 26

What is the main purpose of a network intrusion detection system (IDS)?

Accepted Answer

Detecting and alerting on suspicious network activity.

Answer

Preventing unauthorized access to the network

Answer

Scanning for vulnerabilities in the network

Question 27

Which network hardening best practice involves disabling unnecessary services and ports?

Accepted Answer

Disable unnecessary services and ports.

Answer

Use weak passwords.

Answer

Allow all incoming network traffic.

Answer

Leave default configurations unchanged.

Question 28

What is the fundamental difference between a threat and a vulnerability?

Accepted Answer

A threat is a potential harm, while a vulnerability is a weakness that can be exploited.

Answer

A threat is always intentional, while a vulnerability is not.

Answer

A vulnerability is always more serious than a threat.

Question 29

Which network security tool is used to secure data transmissions by encrypting data?

Accepted Answer

Virtual private network (VPN)

Answer

Intrusion detection system (IDS)

Answer

Firewall

Answer

Vulnerability scanner

Question 30

What is the purpose of conducting a security audit?

Accepted Answer

Evaluating the effectiveness of network security measures.

Answer

Detecting and removing malware

Answer

Configuring network devices