Vocab
Building a Network
The Need for Addressing
Routers and Redundancy
Packets
100
Computing Network
What is a group of interconnected computing devices capable of sending or receiving data?
100
What is a benefit of adding connections in a computer network?
It makes the network fault tolerant
100
How many computers have the same IP Address?
0, every IP Address is a unique number
100
What is Redundancy?
Adding more connections than is necessary to make the network fault tolerant
100
What is a Packet?
A small chunk of data sent over a network
200
Protocol
What is an agreed-upon set of rules that specify the behavior of some system?
200
What is a downside to adding connections in a network?
It's expensive
200
We watched a video in class about IP Addresses. Who did they bring on who co-invented the internet?
Vint Cerf
200
Is information sent from one computer directly to another?
No, information is sent from a computer to a router, which passes the information through a network of routers before reaching its destination
200
What can be a downside to just sending all of the packets at the same time?
They might arrive out of order and some packets might be missing
300
IP Address
What is the unique number assigned to each device on the Internet?
300
What are 2 ways that Person B could transfer information to Person E?
B-A-E
B-C-E
B-D-C-E
300
What does IP in IP Address mean?
Internet Protocol
300
What happens if there's a lot of traffic on the shortest path of routers between computers?
The routers send the information on a different path
300
What does UDP (User Datagram Protocol) do?
It sends all of the packets at once and hopes things work out
400
Fault Tolerant
What is the inclusion of extra components so that a system can continue to work even if individual components fail?
400
What tradeoff do you need to make when building a network?
It needs to be cost efficient while also transferring data quickly
400
Why do computers have IP Addresses?
So data can be sent to the correct computer
400
In the Internet Simulator, why would some messages appear multiple times?
Because they were being sent to a different router, which meant each router the message went through would log it
400
Does Spotify use UDP (User Datagram Protocol) or TCP (Transmission Control Protocol)?
It uses TCP because the order of the packets matter and it also needs to have every packet to work properly
500
Router
What is a type of computer that forwards data across a network?
500
What is bandwidth?
The maximum amount of data that can be sent in a certain amount of time
500
How is an IP Address similar to your mailing address?
Both give your location so the information you want can be delivered to you
500
If a network is not fault tolerant, what can be done to change this?
Add redundancy by increasing the number of connections
500
What do UDP and TCP have in common? How do they differ?
They're similar because both send out all of the packets at the same time. They differ because UDP just hopes it works, but TCP has a system to make sure everything arrived and is ordered properly