GCSE Network Security

What is the main purpose of authentication in network security?

• To filter MAC addresses from network traffic
• To block unauthorised access to a network
• To encrypt data during transmission
• To verify the identity of a user or device

What is a firewall primarily used for in network security?

• To monitor and control incoming and outgoing network traffic
• To authenticate users before granting access
• To encrypt sensitive data
• To filter MAC addresses of devices

Which method is used to convert data into a secure format that cannot be read without a key?

• Encryption
• Authentication
• Firewall
• MAC address filtering

How does MAC address filtering enhance network security?

• By blocking all traffic from unknown sources
• By authenticating users before access
• By encrypting data sent over the network
• By allowing only specific devices to connect to the network

Why is network security important for organisations?

• To ensure all devices are updated regularly
• To reduce the cost of network maintenance
• To increase the speed of network connections
• To protect sensitive data from unauthorised access

What does encryption help to protect during data transmission?

• The physical security of devices
• The speed of the transmission
• The integrity of the network
• The confidentiality of the data

Which of the following best describes authentication?

• The process of confirming a user's identity
• The method of securing data through encryption
• The technology used to filter network traffic
• The technique for blocking unwanted devices

What role does a firewall play in protecting a network?

• It acts as a barrier between a trusted network and untrusted networks
• It encrypts all data transmitted across the network
• It verifies the identity of users trying to access the network
• It filters out MAC addresses from network traffic

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

• Firewall
• Encryption
• Authentication
• Physical security

What is the significance of MAC address filtering in a network?

• It restricts access to the network based on device addresses
• It encrypts data for secure transmission
• It authenticates users before they connect
• It monitors network traffic for suspicious activity