Unit 2: The Internet (APCSP '25-'26 code.org)

Front

What is the purpose of DNS?

Back

It returns the IP address given the name of a website.

Front

What is the purpose of a router?

Back

It forwards a message from one machine to another.

Front

Why was IP v4 replaced by IP v6?

Back

We were running out of IP v4 addresses.

Front

Transmission Control Protocol (TCP):

Back

Provides reliable, ordered, and error-checked delivery of a stream of packets on the internet

Front

Internet Protocol:

Back

Breaks messages into packets and addresses them.

Front

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

Back

DNS hijacking/spoofing

Front

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?

Back

2

Front

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.

Back

None of these statements are true.

Front

What was the main problem that IPv6 was created to solve?

Back

32-bit addresses could not ensure that every internet-connected device can receive a unique IP address.

Front

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

Back

If part of the system fails, the operation continues without interruption