Network Security: Protect Your Networks from Threats

Question 1

Which of the following is not a type of malicious software?

Accepted Answer

Firewall

Answer

Virus

Answer

Trojan

Answer

Spyware

Question 2

What is the primary purpose of a firewall?

Accepted Answer

To prevent unauthorized network access

Answer

To scan for viruses

Answer

To encrypt data

Answer

To perform backups

Question 3

What is the most effective way to protect against phishing attacks?

Accepted Answer

Avoid clicking on suspicious links or opening unsolicited email attachments

Answer

Install antivirus software

Answer

Use strong and unique passwords

Answer

Enable pop-up blockers

Question 4

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

Accepted Answer

Worms can spread on their own, while viruses cannot

Answer

Viruses require a host file, while worms do not

Answer

Viruses are more destructive than worms

Answer

Worms are more difficult to detect than viruses

Question 5

What is the primary role of an intrusion detection system (IDS)?

Accepted Answer

To detect and prevent network attacks

Answer

To scan for malware

Answer

To encrypt data

Answer

To perform backups

Question 6

What is the main purpose of a VPN (Virtual Private Network)?

Accepted Answer

To provide secure remote access to a private network

Answer

To prevent unauthorized network access

Answer

To encrypt data

Answer

To perform backups

Question 7

What is the primary purpose of a firewall in a network security system?

Accepted Answer

To block unauthorized access

Answer

To monitor network traffic for suspicious activity

Answer

To encrypt data transmissions

Answer

To detect intrusions

Question 8

Which encryption algorithm is widely used to secure data in transit?

Accepted Answer

AES

Answer

DES

Answer

RSA

Answer

MD5

Question 9

What is the term for a system that monitors network traffic for suspicious activity?

Accepted Answer

Intrusion detection system

Answer

Firewall

Answer

Anti-virus software

Answer

Proxy server

Question 10

Which of the following is a common social engineering technique used by hackers?

Accepted Answer

Phishing

Answer

Malware distribution

Answer

Buffer overflow

Answer

SQL injection

Question 11

What is the purpose of a network security audit?

Accepted Answer

To identify vulnerabilities and weaknesses

Answer

To implement security measures

Answer

To train employees on security best practices

Answer

To monitor network traffic

Question 12

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

Accepted Answer

Avoid using personal information

Answer

Include common words found in the dictionary

Answer

Use a password that is less than 12 characters long

Answer

Never change your password

Question 13

What is the key difference between symmetric and asymmetric encryption?

Accepted Answer

Symmetric encryption uses one key for both encryption and decryption, while asymmetric encryption uses two different keys.

Answer

Asymmetric encryption uses one key for both encryption and decryption, while symmetric encryption uses two different keys.

Answer

Symmetric encryption is more secure than asymmetric encryption.

Answer

Asymmetric encryption is faster than symmetric encryption.

Question 14

What is the primary objective of network security management?

Accepted Answer

To ensure the confidentiality, integrity, and availability of network resources.

Answer

To train employees on security best practices

Answer

To implement and enforce security policies

Answer

To monitor network traffic for suspicious activity

Question 15

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

Accepted Answer

Antivirus software

Answer

Virus

Answer

Trojan horse

Answer

Worm

Question 16

What is the primary purpose of a firewall?

Accepted Answer

To detect and block unauthorized network traffic

Answer

To encrypt data before it is transmitted

Answer

To monitor network traffic for suspicious activity

Answer

To provide remote access to computers

Question 17

Which type of encryption algorithm is commonly used to secure wireless networks?

Accepted Answer

WPA2

Answer

AES

Answer

RSA

Answer

SSL

Question 18

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

Accepted Answer

To detect and alert administrators to suspicious activity

Answer

To prevent unauthorized access to a network

Answer

To encrypt data transmitted over a network

Answer

To provide remote access to computers

Question 19

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

Accepted Answer

A virus needs a host program to execute, while a worm is self-contained

Answer

A worm needs a host program to execute, while a virus is self-contained

Answer

There is no difference between a virus and a worm

Answer

A virus is always more dangerous than a worm

Question 20

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

Accepted Answer

To provide an isolated area for untrusted network traffic

Answer

To encrypt all network traffic passing through it

Answer

To provide a backup connection to the internet in case of a primary network failure

Answer

To monitor network traffic for suspicious activity

Question 21

Which of the following is NOT a benefit of using cloud-based security services?

Accepted Answer

Complete control over security configurations

Answer

Reduced hardware costs

Answer

Increased flexibility and scalability

Answer

Improved security due to centralized management

Question 22

Why is it essential to regularly update security software?

Accepted Answer

To patch vulnerabilities that could be exploited by attackers

Answer

To improve the performance of the software

Answer

To comply with industry regulations

Answer

To make the software more user-friendly

Question 23

Which of the following is NOT a typical social engineering technique?

Accepted Answer

Brute force attack

Answer

Phishing

Answer

Vishing

Answer

Smishing

Question 24

DDoS attacks are known for overwhelming network bandwidth. Which of the following is the most effective countermeasure against DDoS attacks?

Accepted Answer

Use rate-limiting techniques

Answer

Use honeypots

Answer

Deploy additional hardware resources

Answer

Implement strong encryption

Question 25

Which type of malware infects computers and steals sensitive information?

Accepted Answer

Trojan horse

Answer

Virus

Answer

Worm

Answer

Rootkit

Question 26

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

Accepted Answer

Blocks unauthorized network access

Answer

Detects and responds to intrusion attempts

Answer

Encrypts data before transmission

Answer

Scans for and removes viruses and malware

Question 27

Encryption in network security serves the primary purpose of:

Accepted Answer

Ensuring data confidentiality

Answer

Preventing data alteration during transmission

Answer

Facilitating data recovery in emergencies

Answer

Accelerating data transfer over networks

Question 28

An intrusion detection system (IDS) is primarily designed to:

Accepted Answer

Detect and respond to suspicious network activities

Answer

Prevent unauthorized network access

Answer

Encrypt data before transmission

Answer

Scan and remove viruses and malware

Question 29

What is the fundamental distinction between a virus and a worm?

Accepted Answer

Viruses require a host program to run, while worms operate independently

Answer

Viruses spread via email attachments, while worms exploit network vulnerabilities

Answer

Viruses aim to steal data, while worms seek to damage systems

Answer

Viruses are more prevalent than worms

Question 30

How do Access Control Lists (ACLs) enhance network resource protection?

Accepted Answer

ACLs specify permissions, allowing or denying access to resources based on user or group identity.

Answer

ACLs encrypt network data to safeguard it from unauthorized access.

Answer

ACLs detect and respond to malicious network activity.

Answer

ACLs provide a backup mechanism for network data in case of system failure.

Question 31

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

Accepted Answer

Ransomware

Answer

Phishing

Answer

Trojan

Answer

Virus

Question 32

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

Accepted Answer

To regulate incoming and outgoing network traffic based on defined security rules.

Answer

To provide secure remote access to a network.

Answer

To detect and respond to network intrusions.

Question 33

Which encryption protocol is widely employed to secure network traffic?

Accepted Answer

SSL/TLS

Answer

MD5

Answer

SHA-256

Question 34

Which term describes an individual or group who attempts to gain unauthorized access to a network or computer system?

Accepted Answer

Hacker

Answer

Spammer

Answer

Cybercriminal

Answer

Script kiddie

Question 35

DHCP is a protocol used for managing which aspect of a network?

Accepted Answer

IP address assignment and configuration.

Answer

Data encryption

Answer

Network routing

Answer

File sharing

Question 36

What is the process of identifying potential weaknesses or vulnerabilities in a computer system or network called?

Accepted Answer

Vulnerability assessment

Answer

Risk analysis

Answer

Auditing

Answer

Penetration testing

Question 37

Which type of networking device interconnects multiple networks or network segments?

Accepted Answer

Router

Answer

Firewall

Answer

Access point

Answer

Switch

Question 38

A VPN allows a remote user to access a network or system as if they were physically present on the same network. What does VPN stand for?

Accepted Answer

Virtual Private Network

Answer

Virtual Protected Network

Answer

Virtual Public Network

Question 39

Which security principle emphasizes maintaining the confidentiality, integrity, and availability of information?

Accepted Answer

CIA Triad

Answer

Bell-LaPadula Model

Answer

RBAC Model

Question 40

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

Accepted Answer

To detect and alert on suspicious activities or potential threats to a network or system.

Answer

To encrypt network traffic.

Answer

To prevent unauthorized access to a network.

Question 41

What network security device monitors and controls incoming and outgoing network traffic?

Accepted Answer

Firewall

Answer

Switch

Answer

Modem

Answer

Router

Question 42

Which method encrypts data to protect it from unauthorized access?

Accepted Answer

SSL/TLS

Answer

MAC filtering

Answer

VPN

Answer

Port scanning

Question 43

What type of network security threat involves unauthorized access to a network or device?

Accepted Answer

Hacking

Answer

Malware

Answer

DDoS attack

Answer

Phishing

Question 44

Which software application detects and responds to network security incidents?

Accepted Answer

Intrusion Detection System (IDS)

Answer

VPN

Answer

Anti-virus software

Answer

Firewall

Question 45

What type of network attack involves flooding a website or network with excessive traffic?

Accepted Answer

DDoS attack

Answer

Malware

Answer

Phishing

Answer

Hacking

Question 46

Which is a best practice for maintaining network security?

Accepted Answer

Regularly updating software and firmware

Answer

Opening attachments from unknown senders

Answer

Using weak passwords

Answer

Disabling firewalls

Question 47

Which network protocol provides secure and private communication over the internet?

Accepted Answer

HTTPS

Answer

Telnet

Answer

HTTP

Answer

FTP

Question 48

What is a potential consequence of poor network security?

Accepted Answer

Data breaches

Answer

Increased productivity

Answer

Improved customer satisfaction

Answer

Enhanced employee morale

Question 49

Which of the following is a common type of network security threat?

Accepted Answer

Malware

Answer

Artificial intelligence

Answer

Cloud storage

Answer

Social networking

Question 50

What is the primary purpose of a firewall?

Accepted Answer

Control network traffic

Answer

Store data backups

Answer

Encrypt data

Answer

Detect malware

Question 51

Which of the following is a classification of intrusion detection systems?

Accepted Answer

Signature-based

Answer

Cloud-based

Answer

Mobile-enabled

Answer

Software-defined

Question 52

What is the process of transforming plaintext into an encoded format called?

Accepted Answer

Encryption

Answer

Obfuscation

Answer

Hashing

Answer

Decryption

Question 53

Which of the following is NOT a method of network authentication?

Accepted Answer

Password spraying

Answer

Two-step verification

Answer

Multi-factor authentication

Answer

Biometrics

Question 54

What is the name of the protocol used for secure website browsing?

Accepted Answer

HTTPS

Answer

HTTP

Answer

SMTP

Answer

FTP

Question 55

What is the primary responsibility of a network administrator regarding network security?

Accepted Answer

Implement and manage security measures

Answer

Provide technical support

Answer

Manage network infrastructure

Answer

Develop software applications