Network Security Threats: Types, Vulnerabilities, and Mitigation Strategies

Question 1

What is the primary purpose of a network protocol analyzer?

Accepted Answer

Monitor network traffic

Answer

Detect malicious activities

Answer

Block unauthorized access

Answer

Encrypt data

Question 2

Which attack overwhelms a network with excessive traffic, disrupting its functionality?

Accepted Answer

Denial-of-service attack

Answer

Malware attack

Answer

Phishing attack

Answer

Man-in-the-middle attack

Question 3

Which is an example of a social engineering attack?

Accepted Answer

Sending a phishing email

Answer

Exploiting a software vulnerability

Answer

Denying service to a website

Answer

Intercepting network traffic

Question 4

Which of the following is a benefit of using a honeynet in network security?

Accepted Answer

It serves as a decoy to attract and study attackers

Answer

It blocks unauthorized access to a network

Answer

It detects and neutralizes malware

Answer

It provides encryption for sensitive information

Question 5

What is the main aim of conducting a network security audit?

Accepted Answer

To identify vulnerabilities and weaknesses in a network

Answer

To prevent unauthorized access to a network

Answer

To detect and neutralize malware

Answer

To provide encryption for sensitive information

Question 6

Which of the following is a best practice for securing network passwords?

Accepted Answer

Using strong and unique passwords

Answer

Using weak passwords that are easy to remember

Answer

Reusing passwords across multiple accounts

Answer

Storing passwords in plain text files

Question 7

What is the difference between authentication and authorization in network security?

Accepted Answer

Authentication verifies that a user is who they claim to be, while authorization determines their level of access

Answer

Authorization verifies that a user is who they claim to be, while authentication determines their level of access

Answer

Authentication is done before authorization, while authorization is done after authentication

Answer

Authorization is done before authentication, while authentication is done after authorization

Question 8

What is the purpose of network security monitoring?

Accepted Answer

To detect and respond to security incidents

Answer

To prevent security incidents from happening

Answer

To collect data on network usage

Answer

To improve network performance

Question 9

Which of the following is NOT a best practice for mitigating network security threats?

Accepted Answer

Leaving all ports open on a server

Answer

Regularly updating software and firmware

Answer

Using strong passwords

Answer

Backing up important data

Question 10

Which of the following is NOT a type of malware?

Accepted Answer

Antivirus

Answer

Virus

Answer

Trojan horse

Answer

Spyware

Question 11

Which of the following is a common vulnerability that can lead to phishing attacks?

Accepted Answer

Employee negligence

Answer

Outdated software

Answer

Weak passwords

Answer

Strong network security

Question 12

Which of the following is NOT a type of hacking technique?

Accepted Answer

Firewall installation

Answer

Social engineering

Answer

Brute force attack

Answer

Man-in-the-middle attack

Question 13

Which of the following is NOT a benefit of using a firewall?

Accepted Answer

Improves network speed

Answer

Protects against unauthorized access

Answer

Monitors network traffic

Answer

Detects and blocks malware

Question 14

Which of the following is a common tool for detecting network security threats?

Accepted Answer

All the options mentioned

Answer

Antivirus software

Answer

Intrusion detection system

Answer

Security information and event management (SIEM) system

Question 15

Which of the following is a type of cryptography that uses a private key to encrypt data and a public key to decrypt it?

Accepted Answer

Asymmetric-key cryptography

Answer

Symmetric-key cryptography

Answer

Hashing

Answer

Digital signature

Question 16

Which of the following is a best practice for securing network devices?

Accepted Answer

All the options mentioned

Answer

Implementing strong passwords

Answer

Enabling automatic software updates

Answer

Disabling unnecessary services

Question 17

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

Accepted Answer

Ransomware

Answer

Virus

Answer

Spyware

Answer

Adware

Question 18

What technique involves tricking users into providing sensitive information by impersonating a legitimate entity?

Accepted Answer

Phishing

Answer

Spoofing

Answer

Pharming

Answer

Spam

Question 19

Which tool is commonly used to identify and scan for network security vulnerabilities?

Accepted Answer

Nmap

Answer

Wireshark

Answer

Metasploit

Answer

Burp Suite

Question 20

Which network access control model defines and enforces policies based on user roles and permissions?

Accepted Answer

RBAC

Answer

DAC

Answer

MAC

Answer

ACL

Question 21

What is the main function of a security information and event management (SIEM) system?

Accepted Answer

Collect, analyze, and correlate security events

Answer

Detect and respond to security breaches

Answer

Prevent network security threats

Answer

Monitor network traffic

Question 22

What is the primary objective of implementing network security threats?

Accepted Answer

To safeguard data and resources from unauthorized access and threats

Answer

To enhance user convenience and efficiency

Answer

To reduce network operating costs

Answer

To improve communication speed

Question 23

Which type of malware is designed to encrypt files and demand a ransom to release them?

Accepted Answer

Ransomware

Answer

Virus

Answer

Trojan horse

Answer

Botnet

Question 24

What is the most common tactic used by phishing scammers?

Accepted Answer

Impersonating legitimate organizations through emails or messages

Answer

Exploiting software vulnerabilities to gain access

Answer

Sending unsolicited advertisements or spam

Answer

Using malicious links to infect devices

Question 25

Which of the following is NOT a security vulnerability that hackers can exploit?

Accepted Answer

Strong encryption

Answer

Weak passwords

Answer

Outdated software

Answer

Unsecured Wi-Fi networks

Question 26

What is the primary function of a firewall in network security?

Accepted Answer

Controlling and filtering incoming and outgoing network traffic

Answer

Detecting and preventing malware infections

Answer

Enhancing network speed and performance

Answer

Providing secure remote access

Question 27

In evaluating network security tools, which factor should be prioritized?

Accepted Answer

Functionality and effectiveness

Answer

Cost-effectiveness

Answer

User-friendliness

Answer

Brand recognition

Question 28

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

Accepted Answer

Detect and monitor network traffic for suspicious activity.

Answer

Prevent unauthorized access to network resources.

Answer

Encrypt network traffic to protect data from eavesdropping.

Answer

Provide a secure virtual private network (VPN) for remote access.

Question 29

What is the main objective of a phishing attack?

Accepted Answer

To acquire sensitive information

Answer

To spread malware

Answer

To gain unauthorized system access

Answer

To disrupt network functionality

Question 30

Which of the following techniques is used to mitigate buffer overflow vulnerabilities?

Accepted Answer

Input validation

Answer

Firewalls

Answer

Encryption

Answer

Intrusion detection systems

Question 31

What is the most effective defense against cross-site scripting (XSS) attacks?

Accepted Answer

Output encoding

Answer

Firewalls

Answer

Intrusion detection systems

Answer

Anti-virus software

Question 32

Which of the following is a common vulnerability that can lead to denial-of-service (DoS) attacks?

Accepted Answer

Buffer overflows

Answer

Phishing

Answer

SQL injection

Answer

Cross-site scripting

Question 33

What is the primary function of intrusion detection systems (IDSs)?

Accepted Answer

To detect and respond to suspicious network activity

Answer

To encrypt network traffic

Answer

To prevent unauthorized access to systems

Question 34

What is the primary responsibility of a network security incident response team (SIRT)?

Accepted Answer

To manage and respond to network security incidents

Answer

To develop and implement network security policies

Answer

To conduct vulnerability assessments

Question 35

Which of the following vulnerabilities can increase the risk of malware infections?

Accepted Answer

Unpatched software

Answer

Up-to-date antivirus software

Answer

Secure network configurations

Answer

Strong passwords

Question 36

What is the primary purpose of phishing attacks?

Accepted Answer

To obtain sensitive information such as passwords or credit card numbers

Answer

To steal data from targeted systems

Answer

To disrupt network services

Question 37

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

Accepted Answer

To monitor network traffic for suspicious activity

Answer

To scan networks for vulnerabilities

Answer

To prevent unauthorized network access

Answer

To recover data from compromised systems

Question 38

Which of the following is a benefit of using encryption in network security?

Accepted Answer

Protecting data from unauthorized access

Answer

Reducing bandwidth requirements

Answer

Simplifying network management

Answer

Improving network performance

Question 39

What is the primary objective of a denial-of-service (DoS) attack?

Accepted Answer

To make a network resource unavailable to legitimate users or services.

Answer

To gain unauthorized access to a network

Answer

To steal sensitive data

Question 40

What is the fundamental difference between symmetric and asymmetric encryption algorithms?

Accepted Answer

The use of different keys for encryption and decryption

Answer

The level of security provided

Answer

The speed of the encryption process

Question 41

Which of the following is NOT a common type of malware?

Accepted Answer

Adware

Answer

Botnet

Answer

Backdoor

Answer

Trojan horse

Question 42

Which technique involves using fraudulent emails or websites to trick users into revealing personal or sensitive information?

Accepted Answer

Phishing

Answer

Spamming

Answer

Hacking

Answer

Smishing

Question 43

Which of the following is NOT a common method that hackers use to gain unauthorized access to networks?

Accepted Answer

Strong passwords

Answer

Exploiting software vulnerabilities

Answer

Outdated operating systems

Answer

Vulnerable system configurations

Question 44

Which type of security control is focused on limiting access to specific resources only to authorized users?

Accepted Answer

Access control

Answer

Virtualization

Answer

Cryptography

Answer

Auditing

Question 45

Which fundamental principle of cybersecurity emphasizes keeping information private and inaccessible to unauthorized individuals?

Accepted Answer

Confidentiality

Answer

Integrity

Answer

Non-repudiation

Answer

Availability

Question 46

Which type of security assessment involves simulating an attack to identify potential vulnerabilities?

Accepted Answer

Penetration testing

Answer

Vulnerability scanning

Answer

Risk assessment

Answer

Security audit

Question 47

Which of the following is NOT a common technique used by hackers to gain unauthorized access to networks?

Accepted Answer

Brute force attack

Answer

Social engineering

Answer

Buffer overflow

Question 48

Which of the following is NOT a common type of malware?

Accepted Answer

Trojan Horse

Answer

Virus

Answer

Hoax

Answer

Adware

Question 49

What is the technique used to trick people into revealing confidential information by sending them fake emails or messages that appear to come from a legitimate source?

Accepted Answer

Phishing

Answer

Spoofing

Answer

Malware

Answer

Spamming

Question 50

What is the purpose of a firewall?

Accepted Answer

To monitor and control incoming and outgoing network traffic

Answer

To prevent hacking

Answer

To scan for malware

Question 51

Which of the following is a type of encryption used to protect data in transit?

Accepted Answer

SSL

Answer

AES

Answer

DES

Answer

RSA

Question 52

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

Accepted Answer

To detect and alert on suspicious network activity

Answer

To scan for malware

Answer

To prevent hacking

Question 53

Which of the following is a common network security threat that involves unauthorized access to, use, disclosure, disruption, modification, or destruction of information?

Accepted Answer

Cyberattack

Answer

Spam

Answer

Malware

Answer

Phishing

Question 54

What is a honey pot?

Accepted Answer

A system designed to attract and trap hackers

Answer

A database of known vulnerabilities

Answer

A type of firewall

Answer

A software program that scans for malware

Question 55

Which of the following is a key component of a comprehensive network security strategy?

Accepted Answer

Regular security audits

Answer

Relying solely on antivirus software

Answer

Using only open-source software

Answer

Never patching software

Question 56

What is the primary goal of network security?

Accepted Answer

To protect the confidentiality, integrity, and availability of network resources

Answer

To prevent all cyberattacks

Answer

To eliminate all vulnerabilities