Computer Science Unit 2 Flashcards
What is IP (Internet Protocol)? Can IP Addresses be duplicated?
- Its a unique address for devices on the internet.
- IP Addresses are unique
What is the WWW
Collection of pages and files shared between computers using the HTTP Protocol?
Is TCP a faster protocol than UDP? Why?
UDP is faster than TCP because TCP takes extra time to do error checking.
What is the unit in which data travels on the internet? (Chunk of Data and its metadata)
Packet
What is a collection of packets called?
a data stream
In order to communicate do two computers or devices need to be directly connected?
No. They both need to be connected to the internet.
Which protocol takes inventory of data packets to ensure they are successfully sent and received?
TCP
What is the definition of a packet
a chunk of data and its metadata user to route and reassemble information on the internet
Are the protocols on the internet considered “open” or “secret” or owned by companies?
Open! All the internet protocols are open
What is a data stream
the way in which data travels on the internet. Not as a single stream but in chunks
Which protocol sends all packets without checking to make sure they were sent or ordered properly
UDP
What does an IP Address look like?
4 numbers separated by periods. all 4 numbers are between 0-255
- 10.0.0.1
- 255.255.255.255
- 13.163.29.209
What is DNS?
The method used by computers to look up the IP address based on a host name
www.google.com –> 172.217.14.68
What protocol is used to dend files over the internet?
Files are sent over HTTP using TCP/IP
What is the S in HTTPS
“Secure”
Describe Fault Tolerance
Fault tolerance is the ability for a computer system or network to continue working if part of it fails.
Describe “scalability”
The ability for a computer or system to process grow to meet demand
Give an example of fault tolerance using a city’s streets
If a road is under construction, you can take another path to get to the same destination
What is a “path”
A path is the set of computers that data travels through on its destination. Its similar to navigation in a car
Give a real life example of a Path
The route you take to drive to Disneyland. (thru Baker, thru Yermo, through Victorville, to Anaheim)
Do packets of data always take the same path between computer devices?
No, they take the best path available.
Give an example of the “digital divide”
When people dont have equal access to the internet.
- Voter registration only available on a government website
- Healthcare signup only available on a website
What is a “divide”
a divide is a gap.
Does a digital divide refer to a physical distance?
No. The digital divide is more about equal access to the internet
