Year 9 A1L2 Network Connectivity

Where are Data Cables found?

• In the sky
• Inside buildings
• On land
• Under the sea

How many cables can be found under the sea?

• 493
• 300
• 1000
• 250

How much does a cable cost?

• £300 million
• £150 million
• £500 million
• £200 million

What do the cables need to be protected from?

• Shark attacks and natural disasters
• Space debris
• Solar flares
• Animal interference

How much data can travel through the network?

• 400GB per second
• 100GB per second
• 1TB per second
• 200GB per second

Why are repeaters used?

• So that there is no loss in data
• To speed up the connection
• To increase cable length
• To cool down the cables

What can cause disruption to the data traveling?

• Attacks on the cable/Natural disasters
• Weather changes
• Network congestion
• Power outages

Does politics and relations between countries affect our networks? Why?

• Yes, because some countries do not like each other, they do not trust each other and fear that the data cables could be used for spying
• No, politics does not affect network operations
• Only if there are trade disputes
• Yes, but only because of tariffs

How can you be 100% sure that all the data will be delivered? (4:12)

• The sender requests an acknowledgment for each packet received.
• The sender sends multiple copies of each packet.
• The recipient sends back a confirmation for each packet received.
• The routers track each packet and ensure delivery.

What does 'scalable' mean? How is this linked to TCP and routers?

• The network can grow and still function efficiently, managed by TCP and routers.
• The network can reduce in size and still function, controlled by TCP.
• The network becomes faster as more devices connect, using routers.
• The network can prioritize certain data types, controlled by TCP and routers.