Network Security Threats: Learn and Test Your Knowledge

Question 1

A network administrator notices a significant decrease in network performance. Several users are reporting an inability to access network resources. Which type of attack is MOST likely occurring?

Accepted Answer

Denial-of-Service (DoS)

Answer

Phishing

Answer

Social Engineering

Answer

Malware

Question 2

Which of the following is an example of a social engineering attack?

Accepted Answer

An attacker impersonating a technical support representative to obtain a user's password.

Answer

A malicious program that installs itself on a computer without the user's knowledge.

Answer

A hacker exploiting a vulnerability in a web server to gain access to sensitive data.

Question 3

What type of malware disguises itself as legitimate software to trick users into installing it?

Accepted Answer

Trojan Horse

Answer

Virus

Answer

Spyware

Answer

Worm

Question 4

Which security measure is specifically designed to prevent unauthorized access to a network by verifying the identity of users?

Accepted Answer

Authentication

Answer

Firewall

Answer

Antivirus Software

Answer

Encryption

Question 5

What is the primary purpose of a firewall?

Accepted Answer

To control incoming and outgoing network traffic based on predetermined security rules.

Answer

To detect and remove viruses and other malware from network devices.

Answer

To encrypt sensitive data transmitted over the network.

Question 6

Which of the following is an example of a phishing attack?

Accepted Answer

An email that appears to be from a legitimate bank, asking the recipient to verify their account information.

Answer

A software program that replicates itself and spreads to other computers on the network.

Question 7

What is the purpose of encryption in network security?

Accepted Answer

To protect sensitive data by converting it into an unreadable format.

Answer

To detect and prevent unauthorized access to network resources.

Answer

To control the flow of network traffic based on predefined rules.

Question 8

Which type of attack exploits a vulnerability in a software application to gain unauthorized access to a system?

Accepted Answer

Software Exploit

Answer

Man-in-the-Middle Attack

Answer

Dictionary Attack

Answer

Brute-Force Attack

Question 9

What is the role of a Virtual Private Network (VPN) in network security?

Accepted Answer

To create a secure connection over an untrusted network, such as the Internet.

Answer

To detect and remove malicious software from network devices.

Answer

To prevent unauthorized access to a private network by filtering incoming and outgoing traffic.

Question 10

Which of the following is a recommended practice for creating a strong password?

Accepted Answer

Use a combination of upper and lowercase letters, numbers, and symbols.

Answer

Use easily remembered information, such as birthdays or pet names.

Answer

Keep the same password for all your accounts for convenience.

Question 11

Which of the following is NOT a common type of network security threat?

Accepted Answer

Hardware failure

Answer

Malware

Answer

Phishing

Question 12

What is the purpose of a phishing attack?

Accepted Answer

To steal sensitive information

Answer

To spread malware

Answer

To disable a network

Answer

To overload a server with traffic

Question 13

Which of the following is a measure that can be taken to mitigate a denial of service attack?

Accepted Answer

Use a firewall to block suspicious traffic

Answer

Create strong passwords

Answer

Update software regularly

Answer

Install anti-virus software

Question 14

What is a vulnerability in the context of network security?

Accepted Answer

A weakness that can be exploited by an attacker

Answer

A type of malware

Answer

A network device that is not properly configured

Answer

A user who does not follow security best practices

Question 15

What is the role of a firewall in network security?

Accepted Answer

To monitor and control network traffic

Answer

To detect and remove malware

Answer

To backup network data

Answer

To encrypt sensitive data

Question 16

Which of the following is a best practice for creating strong passwords?

Accepted Answer

Use a combination of upper and lowercase letters, numbers, and symbols

Answer

Use the same password for all accounts

Answer

Write down your passwords in a notebook

Question 17

What is the purpose of network security monitoring?

Accepted Answer

To detect and respond to security incidents

Answer

To improve network performance

Answer

To manage network devices

Answer

To troubleshoot network problems

Question 18

Which of the following is a common security risk associated with using public Wi-Fi networks?

Accepted Answer

Man-in-the-middle attacks

Answer

Limited bandwidth

Answer

Slow internet speeds

Answer

Power outages