Unit 2

This 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

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

Which of the following best explains what happens when a new device is connected to the Internet?^

An Internet Protocol (IP) address is assigned to the device.

Researchers have developed a simulation of packets traveling between server computers and client computers in a network. Of the following, which two outcomes are most likely to be results of the simulation?^

Better understanding of the effect of temporarily unavailable network connections AND; Better understanding of the impact of increased connection speeds for frequently visited servers

The figure below shows two possible network configurations for devices P through V. A line between two devices indicates a connection. Devices can communicate only through the connections shown. In which of the configurations is it possible to have redundant routing between devices Q and V?^

Both configuration I and configuration II

Which of the following best explains how fault tolerance in a network is achieved?^

By providing multiple paths between devices, enabling routing to occur even in the presence of a failed component

Which of the following best describes the role of the Internet Engineering Task Force (IETF) ?^

Developing standards and protocols for Internet communication

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

This diagram shows a number of computing devices connected to the Internet with each line representing a direct connection.

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

Which of the following explains a benefit of using open standards and protocols for Internet communication?^

Open standards and protocols allow different manufacturers and developers to build hardware and software that can communicate with hardware and software on the rest of the network.

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.

Redundant networks are more reliable

Which of the following best describes the relationship between the World Wide Web and the Internet?^

The World Wide Web is a system of linked pages, programs, and files that is accessed via a network called the Internet.

Emilee is watching an online video. The 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

The transmission control protocol (TCP) and Internet protocol (IP) are used in Internet communication. Which of the following best describes the purpose of these protocols?^

To establish a common standard for sending messages between devices on the Internet

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

Transmission Control Protocol (TCP)

The figure below shows two possible network configurations for devices P through V. A line between two devices indicates a connection. Devices can communicate only through the connections shown. In configuration I, what is the minimum number of connections that must be broken or removed before device T can no longer communicate with device U?^

Two

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

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.

fault-tolerance