Networking: Chapter 6 (Network Security)

Question 1

What is the purpose of network security?

Answer 1

To protect data on the network, the network itself and the users of the network

Question 2

What are the main security measures? (3)

Answer 2

• User access rights
• Encryption
• Human Engineering

Question 3

What are some user access rights? (2)

Answer 3

• Using file permissions so only some users can access certain files
• Using access rights to hardware so only some users can access certain storage devices

Question 4

What are the 3 network security requirements?

Answer 4

• Confidentiality (Keeping data confidential for security)
• Integrity (Data has to be valid and up to date)
• Availability (Data has to be available to authorised users)

Question 5

What is a Firewall?

Answer 5

A Firewall checks all packets of data coming in and going out of a network, and determines whether to allow the packets to go to their destination

Question 6

What is Filtering Software?

Answer 6

It blocks the viewing of undesirable Internet content by searching keywords and checking content ratings

Question 7

What is a Walled Garden?

Answer 7

These provide a restricted view of the Internet, and the user can only access websites that have been specifically selected.

Question 8

What are the 2 methods a Firewall uses to protect a LAN from outside attacks?

Answer 8

• Packet Filtering (Filters packets bases on the IP address or Domain name)
• Circuit Level Filtering (Sets up a secure connection between a network and a remote user)