AP Computer Science Principals - Unit 2 Test Answers

Jesse purchases a new smartphone and is immediately able to use it to send a photo over the Internet to a friend who lives in a different country. Which of the following is NOT necessary to make this possible?

A single direct connection is established between any two devices connected to the Internet

Which of the following situations is most likely to cause issues arising from the digital divide?

A state makes voter registration forms available only by visiting a government website

The diagram shows a number of computing devices connected to the internet with each line representing a direct connection. What is the MINIMUM number of paths that would need to be broken to prevent Computing Device A from connecting with Computing Device E?

3

Which of the following is true of how packets are sent through the internet?

Packet metadata is used to route and reassemble information travelling through the Internet

Which of the following is MOST likely to be an outcome of the digital divide?

People from some racial or ethnic groups have unequal access to computing technology

An Internet service provider (ISP) is a company that builds the routers and wired connections that allow individuals to access the internet. An ISP is considering adding additional redundant connections to its network. Which of the following best describes why the company would choose to do so?

Redundant networks are more reliable

Emilee is watching an online video. This video is being sent to her laptop by a server over the internet which splits the video into packets and sends them in the order they appear in the video. Which of the following is true about how the packets will arrive at her computer?

The packets may arrive out of order

Which of the following best describes the protocols used on the internet?

The protocols of the Internet are open and used by all devices connected to the network

Which of the following is true of how the internet has responded to the increasing number of devices now using the network?

The protocols of the Internet were designed to scale as new devices are added

Which of the following internet protocols is MOST important in reassembling packets and requesting missing packets to form complete messages?

Transmission Control Protocol (TCP)

Computing System

a group of computers working together for a common purpose

Computing Network

a group of connected computers that can send or receive data

Computing Device

a machine that can run a program

Path

a sequence of direct connections

Which of the following internet protocols is used to request and send pages and files on the World Wide Web?

Hypertext Transfer Protocol (HTTP)

Which of the following best describes the purpose of an IP address?

IP addresses provide a unique number for identifying devices that send and receive information on the Internet

Two devices are connected to the Internet and communicating with one another. A squirrel chews through one of the wires in the network that is currently being used by the devices to communicate. The network immediately begins using a different path through the network and communication continues as normal. This situation best exemplifies which principle?

fault tolerance

The diagram shows a number of computing devices connected to the internet with each line representing a direct connection. Device A is attempting to send data over the internet to Device E. Which of the following is true of how the data will travel through the network?

it is possible that the data travels through any of the devices in the network before arriving at device E