Network Security: Protect Your Networks from Cyber Threats

Question 1

What type of software is专门 designed to detect and respond to anomalous network behavior?

Accepted Answer

Intrusion Detection System (IDS)

Answer

Firewall

Answer

Antivirus

Answer

Spam filter

Question 2

What is the primary purpose of a VPN?

Accepted Answer

To establish a secure connection over a public network to a remote network

Answer

To encrypt network traffic

Answer

To allow remote desktop access

Answer

To improve network performance

Question 3

How do firewalls differ from intrusion detection systems?

Accepted Answer

Firewalls prevent malicious traffic from entering a network, while IDS detect and respond to suspicious activity.

Answer

Firewalls detect and respond to suspicious activity, while IDS prevent malicious traffic from entering a network.

Answer

Both firewalls and IDS prevent malicious traffic from entering a network.

Answer

Both firewalls and IDS detect and respond to suspicious activity.

Question 4

Which of the following is a common type of social engineering attack?

Accepted Answer

Phishing

Answer

Malware

Answer

Buffer overflow

Answer

SQL injection

Question 5

What is the primary objective of a security audit?

Accepted Answer

To identify and assess vulnerabilities in a network

Answer

To implement security measures

Answer

To train network administrators on security best practices

Answer

To investigate security incidents

Question 6

Which of the following is the most effective method to prevent unauthorized network access?

Accepted Answer

Implement a firewall

Answer

Install an antivirus program

Answer

Disable unused network ports

Answer

Educate users about network security

Question 7

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

Accepted Answer

Monitor network traffic for suspicious activity

Answer

Prevent attacks from entering the network

Answer

Block malicious software from infecting devices

Answer

Encrypt data before transmission

Question 8

Which of the following is a recommended practice for creating robust passwords?

Accepted Answer

Use a combination of uppercase, lowercase, numbers, and symbols

Answer

Choose a password that is easy to remember

Answer

Reuse the same password for multiple online accounts

Answer

Write down your passwords on paper

Question 9

Differentiate between active and passive network attacks.

Accepted Answer

Active attacks modify data or disrupt network services, while passive attacks gather information without affecting the network

Answer

Active attacks are more prevalent than passive attacks

Answer

Passive attacks are more challenging to detect than active attacks

Answer

There is no distinction between active and passive attacks

Question 10

Which type of intrusion detection system monitors network traffic in real-time for suspicious activity?

Accepted Answer

Network-based IDS

Answer

Host-based IDS

Answer

Signature-based IDS

Answer

Anomaly-based IDS

Question 11

What is the main purpose of a firewall in network security?

Accepted Answer

To prevent unauthorized access to a network

Answer

To detect and block malicious traffic

Answer

To encrypt data transmitted over a network

Answer

To monitor network traffic for potential threats

Question 12

What is the primary goal of using encryption in network security?

Accepted Answer

To safeguard data from unauthorized access

Answer

To enhance network performance

Answer

To detect network intrusions

Answer

To prevent data loss

Question 13

What is the distinction between a vulnerability and a threat?

Accepted Answer

A vulnerability is a system weakness, while a threat exploits that weakness

Answer

A vulnerability is an exploit that takes advantage of a weakness, while a threat is a potential risk

Answer

A vulnerability is a potential risk, while a threat is a weakness

Answer

There is no distinction between a vulnerability and a threat

Question 14

For maximum protection of sensitive network communications, which encryption algorithm and protocol combination is optimal?

Accepted Answer

AES-256 with TLS 1.3

Answer

3DES with SSH

Answer

RC4 with SSLv3

Answer

IDEA with IPsec

Question 15

Which type of intrusion detection system (IDS) is most effective for identifying unusual patterns in network traffic as it occurs?

Accepted Answer

Anomaly-based IDS

Answer

Network IDS

Answer

Host-based IDS

Answer

Signature-based IDS

Question 16

Which of these actions is **NOT** a recommended network security practice?

Accepted Answer

Connecting to public Wi-Fi networks without security measures

Answer

Keeping operating systems and software up-to-date

Answer

Using strong passwords and two-factor authentication

Answer

Implementing firewalls and intrusion detection/prevention systems

Question 17

Identify which of the following is not considered a network security threat:

Accepted Answer

Software update

Answer

Malware

Answer

Phishing

Answer

Denial of service

Question 18

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

Accepted Answer

Hardware failure

Answer

Phishing

Answer

DoS attack

Answer

Malware

Question 19

What is the primary purpose of a firewall?

Accepted Answer

To monitor and control incoming and outgoing network traffic based on predefined security rules

Answer

To encrypt sensitive data

Answer

To detect and prevent intrusion attempts

Question 20

What is the purpose of encryption in network security?

Accepted Answer

To transform plaintext into ciphertext to protect data confidentiality and integrity

Answer

To provide fault tolerance and redundancy

Answer

To identify and block malicious network traffic

Question 21

Which of the following is a key security principle that involves restricting access to only essential resources?

Accepted Answer

Least privilege

Answer

Defense in depth

Answer

Separation of duties

Answer

Multi-factor authentication

Question 22

What is the purpose of network segmentation?

Accepted Answer

To subdivide a network into smaller, isolated segments to enhance security and control

Answer

To increase network performance and scalability

Answer

To provide redundancy and failover capabilities

Question 23

What is the recommended best practice for managing user passwords?

Accepted Answer

Enforce strong password policies, require regular password changes, and provide secure password storage

Answer

Store passwords in plain text for easy retrieval

Answer

Allow users to choose weak passwords for convenience

Question 24

Which of the following is a technique used in social engineering attacks?

Accepted Answer

Phishing

Answer

Malware injection

Answer

SQL injection

Question 25

What is the primary benefit of network security monitoring and auditing?

Accepted Answer

To proactively detect and respond to security incidents, ensuring timely mitigation

Answer

To generate reports for compliance purposes only

Answer

To provide a history of network activity for troubleshooting