How does information get transferred from one computer to another?

• Information is broken down into packets and sent through various routes.

• Information is sent as a continuous stream directly between computers.

• Information is copied and sent to all connected devices simultaneously.

• Information is physically transported on storage devices.

What is the analogy made of data on a network? (1:48)

• Data is like a package sent through the postal system.

• Data is like a river flowing to its destination.

• Data is like a car driving on a highway.

• Data is like a person walking to a store.

Why doesn’t data travel on a straight path? Is that a good thing or bad? Why?

• Data takes multiple routes to avoid congestion, which is good for reliability.

• Data takes different paths to save energy, which is bad because it slows down delivery.

• Data avoids straight paths to stay hidden, which is good for security.

• Data takes curved paths due to the curvature of the Earth, which is bad for speed.

Give examples of three different types of information that can travel on a network.

• Text, images, and videos.

• Physical objects, sound waves, and radio signals. 

• Air, water, and light.

• People, animals, and plants.

What are routers? What do they do?

• Routers direct data packets to their correct destination. 

• Routers create data packets from information.

• Routers encrypt data for secure transmission.

• Routers store data until it is needed.

What is the purpose of the “internet protocol” (IP)?

• To ensure all devices follow the same rules for sending and receiving data. 

• To track the location of all devices on the internet.

• To speed up the transfer of data between devices.

• To block unauthorized devices from accessing the internet.

What does “fault tolerant” mean? How does it work?

• The network can still function even if some parts fail, by using alternate routes.

• The network automatically shuts down when a fault is detected to prevent damage.

• The network requires manual intervention to fix faults before continuing.

• The network will ignore minor faults and continue operating as if nothing happened.

What is the key principle of “reliability”? (4:01)

• Ensuring that data is delivered accurately and in the correct order.

• Making sure that data is delivered as quickly as possible.

• Preventing unauthorized access to data during transmission.

• Ensuring that all devices are always connected to the network.

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.