Computer Science Networks

Give the definition of a network.

Which of the answers below are examples of a network?

• LAN

• Extranet

• P2P

• VPN

• All of the above

What is the difference between a hub and a switch?

• Hubs connect all devices while switches only connect 2 devices

• Hubs forward data to all connected users while switches only forward to the intended recipient

• Hubs are more secure while switches are prone to data collisions and high traffic

• There is no difference

What are the 7 layers of the OSI Model?

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What is the definition of a protocol?

Why are protocols necessary? (Tick all correct answers)

• Ensure data integrity

• Manage traffic and flow control

• Prevent deadlock

• Allow hacking of systems

What is the primary cause of variation of data transfer speeds?

Which of these are characteristics of transmission media? (Tick all correct answers)

• Security

• Reliability

• Time Taken

• Distance

• Speed

What are the contents of a data packet?

Explain the concept of packet switching when transmitting data.