4.1.5 Network security:

• Confidentiality in network security ensures that sensitive information is accessible to all users.

  False
• Availability in network security guarantees that network resources are accessible when needed.

  True
• Hacking involves unauthorized individuals gaining access to a network to steal data or disrupt operations
• What is eavesdropping in network security?

  Monitoring network traffic
• Encryption ensures confidentiality by converting data into a coded format.


  True
• Firewalls block unauthorized access and prevent disruptions to network availability
• What are the primary goals of network security?

  Confidentiality, integrity, availability
• Firewalls prevent disruptions to availability by blocking malicious traffic.


  True
• Encryption ensures data confidentiality
• Firewalls monitor network traffic to ensure data availability
• Backups ensure data integrity and availability in case of loss or corruption.

  True
• What is the primary goal of authentication in network security?

  Verifying user identity
• Match the authentication method with its primary advantage:

  Biometrics ↔️ Highly secure, difficult to forge

  Multi-factor Authentication (MFA) ↔️ Provides an extra layer of security
• Firewalls use techniques such as packet filtering, stateful inspection, and proxy firewalls to filter traffic.


  True
• The appropriate type of firewall depends on the size and security needs of the network
• What does integrity in network security ensure about data?

  Accuracy and consistency
• Malware includes viruses, worms, and Trojans, which can disrupt or damage a network.

  True
• Eavesdropping involves unauthorized monitoring of network traffic to steal sensitive information
• Firewalls block unauthorized access to maintain availability.


  True
• Backups ensure both data integrity and availability
• What is the purpose of authentication?

  Verify user identity
• Passwords are familiar to users but can be easily compromised
• Effective authentication methods contribute to confidentiality and integrity
• Hardware firewalls are less secure than software firewalls.

  False
• A software firewall relies on the operating system's security
• Firewalls protect against DoS attacks by controlling network traffic.


  True
• Match the IDS component with its function:

  Sensors ↔️ Collect network traffic

  Analysis Engine ↔️ Identify suspicious patterns

  Database ↔️ Store intrusion signatures
• Host-based IDS provides detailed insights at the server level.

  True
• Match the security aspect with its description:

  Confidentiality ↔️ Authorized access to data

  Integrity ↔️ Accuracy of data

  Availability ↔️ Accessible network resources
• Network security aims to ensure the confidentiality, integrity, and availability
• Integrity in network security maintains the accuracy and consistency of data
• What is the purpose of malware in a network threat?

  Disrupt or gain access
• Denial of Service (DoS) attacks overwhelm a network with traffic, rendering it unavailable.

  True
• Social engineering involves manipulating people into revealing sensitive information
• How do access controls maintain integrity in a network?

  Restrict user access
• Backups ensure availability and integrity by creating copies of data.


  True
• Encryption converts data into a coded format accessible only with a decryption key
• Steps to implement network security measures

  1️⃣ Identify network threats

  2️⃣ Implement encryption

  3️⃣ Set up access controls

  4️⃣ Install firewalls

  5️⃣ Create data backups
• Access controls maintain data integrity by preventing unauthorized modifications.

  True
• What type of software detects and removes malicious code to protect data?

  Antivirus/Antimalware