Computer Science Unit 2

Question 1

What is IP (Internet Protocol)? Can IP Addresses be duplicated?

Answer 1

• Its a unique address for devices on the internet.
• IP Addresses are unique

Question 2

What is the WWW

Answer 2

Collection of pages and files shared between computers using the HTTP Protocol?

Question 3

Is TCP a faster protocol than UDP? Why?

Answer 3

UDP is faster than TCP because TCP takes extra time to do error checking.

Question 4

What is the unit in which data travels on the internet? (Chunk of Data and its metadata)

Answer 4

Packet

Question 5

What is a collection of packets called?

Answer 5

a data stream

Question 6

In order to communicate do two computers or devices need to be directly connected?

Answer 6

No. They both need to be connected to the internet.

Question 7

Which protocol takes inventory of data packets to ensure they are successfully sent and received?

Answer 7

TCP

Question 8

What is the definition of a packet

Answer 8

a chunk of data and its metadata user to route and reassemble information on the internet

Question 9

Are the protocols on the internet considered “open” or “secret” or owned by companies?

Answer 9

Open! All the internet protocols are open

Question 10

What is a data stream

Answer 10

the way in which data travels on the internet. Not as a single stream but in chunks

Question 11

Which protocol sends all packets without checking to make sure they were sent or ordered properly

Answer 11

UDP

Question 12

What does an IP Address look like?

Answer 12

4 numbers separated by periods. all 4 numbers are between 0-255
- 10.0.0.1
- 255.255.255.255
- 13.163.29.209

Question 13

What is DNS?

Answer 13

The method used by computers to look up the IP address based on a host name

www.google.com –> 172.217.14.68

Question 14

What protocol is used to dend files over the internet?

Answer 14

Files are sent over HTTP using TCP/IP

Question 15

What is the S in HTTPS

Answer 15

“Secure”

Question 16

Describe Fault Tolerance

Answer 16

Fault tolerance is the ability for a computer system or network to continue working if part of it fails.

Question 17

Describe “scalability”

Answer 17

The ability for a computer or system to process grow to meet demand

Question 18

Give an example of fault tolerance using a city’s streets

Answer 18

If a road is under construction, you can take another path to get to the same destination

Question 19

What is a “path”

Answer 19

A path is the set of computers that data travels through on its destination. Its similar to navigation in a car

Question 20

Give a real life example of a Path

Answer 20

The route you take to drive to Disneyland. (thru Baker, thru Yermo, through Victorville, to Anaheim)

Question 21

Do packets of data always take the same path between computer devices?

Answer 21

No, they take the best path available.

Question 22

Give an example of the “digital divide”

Answer 22

When people dont have equal access to the internet.

• Voter registration only available on a government website
• Healthcare signup only available on a website

Question 23

What is a “divide”

Answer 23

a divide is a gap.

Question 24

Does a digital divide refer to a physical distance?

Answer 24

No. The digital divide is more about equal access to the internet