Unit 2: The Internet (APCSP code.org)

Which of the following best describes the basic idea of fault tolerance?

• A system that never fails
• If part of the system fails, the operation continues without interruption
• A program that does not allow inputs out of a range given by a programmer
• A program that does not allow loss of precision

Which of the following statements about packets is true?

• Packets must be sent in order so they can be reassembled at the end host.

• Packet switching results in a sustained, single connection between two hosts.

• All packets must pass through a centralized router to be verified.

• None of these statements are true.

• All of these statements are true.

IP Address stands for Interchangable Packets

• True
• False

When sending packets of information, it will typically include "data about the data" which includes the IP address of both where it came from and who it's going to:

• Packet Metadata

• HTTP

• Data Stream

• DNS

During this COVID pandemic, this issue has been a concerning topic with students in various districts across the country having differing access to computing devices and the Internet (which could be due to socioeconomic, geographic, or demographic characteristics):

• Internet Censorship

• Net Neutrality

• Digital Divide

• Redundancy

HTTP is considered to be a high level protocol because:

• HTTP messages can be either requests or responses

• HTTP requests are given higher priority for fast delivery when being routed on the Internet

• HTTP requests are encoded using higher frequency radio waves

• HTTP requests make use of abstractions provided by lower level protocols

Which of the following is FALSE regarding packets?

• It's possible packets could arrive in the order they were sent

• Packets could arrive out of order from the order they were originally sent

• The speed that packets arrive in is unimportant

• If a couple of packets are missing from the original message sent, only those packets needs to be resent (and not all the packets in their entirety)

Given the following network diagram, what is the minimum number of connections that must be broken or removed before computer E can no longer communicate with computer B?

• 1
• 2
• 3
• 4

Which type of attack is this: 
Redirecting a site's IP to a similar, fake site to collect user input information?

• DDOS
• DNS hijacking/spoofing
• Wire tapping

Devices are assigned unique numbers (converted to binary sequences) called packet numbers.

• True

• False