16. AQA GCSE (8525) SLR3 – 3.5 The need for & methods of network

What is the overall aim of network security?

• To only allow authorized people access to what they need and prevent unauthorized access

• To make the network faster

• To monitor user activity

• To restrict all external access

Answer explanation

The overall aim of network security is to only allow authorized people access to what they need and prevent unauthorized access, ensuring the network's safety and integrity.

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

• Biometric scanning

• Encryption

• Firewalls

• MAC address filtering

Answer explanation

Biometric scanning is NOT a method of network security mentioned. The other options - Encryption, Firewalls, and MAC address filtering are all methods of network security.

What does authentication in network security involve?

• Filtering MAC addresses

• Encrypting data

• Using a valid username and password

• Scanning a fingerprint

Answer explanation

Authentication in network security involves using a valid username and password to verify the identity of a user before granting access to the network.

What is the purpose of encryption in network security?

• To turn plaintext into unreadable format

• To monitor internet traffic

• To filter out unauthorized devices

• To authenticate users

Answer explanation

The purpose of encryption in network security is to turn plaintext into an unreadable format, ensuring data confidentiality and security.

What does a firewall do?

• Filters traffic based on predefined rules

• Authenticates users

• Encrypts data

• Assigns IP addresses

Answer explanation

A firewall filters traffic based on predefined rules, allowing or blocking data packets based on specified criteria, such as source, destination, or type of traffic.

What is unique about a MAC address?

• It is assigned by the network administrator

• It changes every time the device connects to a network

• It is the same as an IP address

• It is universally unique and embedded into the device's network adapter

Answer explanation

A MAC address is universally unique and embedded into the device's network adapter, distinguishing it from other devices on the network.

When is encryption particularly used?

• For blocking internet traffic

• For transmitting sensitive data

• For authenticating users

• For filtering MAC addresses

Answer explanation

Encryption is particularly used for transmitting sensitive data to ensure that the information remains secure and protected from unauthorized access.

What is the role of password rules in authentication?

• To configure firewalls

• To filter MAC addresses

• To ensure passwords are difficult to guess

• To make the encryption stronger

Answer explanation

Password rules play a role in authentication by ensuring passwords are difficult to guess, enhancing security by preventing unauthorized access.

Why might a network use MAC address filtering?

• To authenticate users based on passwords

• To encrypt data

• To allow only specific devices access to the network

• To monitor internet traffic

Answer explanation

MAC address filtering is used to allow only specific devices access to the network by filtering based on the unique MAC addresses of devices.

What is NOT a function of firewalls?

• Encrypting data

• Allowing certain types of traffic through

• Blocking certain types of internet traffic

• Inspecting traffic for suspicious content

Answer explanation

Firewalls do not encrypt data. Their functions include allowing certain types of traffic through, blocking certain types of internet traffic, and inspecting traffic for suspicious content.