Unit 2 Test

Question 1

A machine that can run a program, including computers, tablets, servers, routers and smart sensors.

Answer 1

Computer Device

Question 2

A GROUP of computing devices and programs working together for a common purpose.

Answer 2

Computer System

Question 3

A group of INTERCONNECTED computing devices capable of sending or receiving data.

Answer 3

Computer Network

Question 4

The series of connections between the computing devices on a network starting with a sender and ending with a receiver.

Answer 4

Path

Question 5

The MAXIMUM amount of data that can be sent in a fixed amount of time, usually measured by bits per second.

Answer 5

Bandwidth

Question 6

An Agreed- upon set of rules that specify the behavior of some system.

Answer 6

Protocol

Question 7

The UNIQUE number assigned to each device on the internet.

Answer 7

IP Address

Question 8

A PROTOCOL for sending data across the internet that assigns a unique numbers to each device.

Answer 8

Internet Protocol

Question 9

The internet uses _____ and ______ to communicate across the shared internet?

Answer 9

Internet Protocol and IP Addresses

Question 10

A type of computer that forwards data across a network.

Answer 10

Router

Question 11

Inclusion of extra components so that a system can continue to work even if individual components fail.
Example: Having more than one path between any two connected devices in a network.

Answer 11

Redundancy

Question 12

When a device can continue to function even if an individual component fails.

Answer 12

Fault Tolerant

Question 13

True or False
Paths can be sent out of order.

Answer 13

True

Question 14

Information passed through the internet in packets.

Answer 14

Data Stream

Question 15

A chunk of data sent over a network.

Answer 15

Packet

Question 16

Data added to packets to help route them through the network and reassemble the original message

Answer 16

Packet MetaData

Question 17

A protocol for sending packets quickly with minimal error

Answer 17

User Datagram Protocol (UDP)

Question 18

The capacity for the system to change in size and scale to meet new demand.

Answer 18

Scalability

Question 19

The system responsible for translating domain names like example.com into IP addresses.

Answer 19

Domain Name System (DNS)

Question 20

A system of linked pages, programs and files

Answer 20

World Wide Web (WWW)

Question 21

Protocol for computers to request and share pages that make up the world wide web on the internet

Answer 21

Hypertext Transfer Protocol (HTTP)

Question 22

True or False
The World Wide Web is the same as the internet

Answer 22

FALSE
- The world wide web are files, web pages and media
- The Internet is the network that we use to get the files, web pages and media

Question 23

True or False
DNS is important system to help the internet scale.

Answer 23

TRUE

Question 23

Which of the following is a primary reason for the use of open protocols on the Internet?

A
Open protocols allow devices to specify how data packets are to be routed on the Internet in advance.

B
Open protocols ensure that all data transmission on the Internet is kept secure.

C
Open protocols ensure that all Internet users are provided connections with equal bandwidth.

D
Open protocols provide a way to standardize data transmission between different devices.

Answer 23

D
Open protocols provide a way to standardize data transmission between different devices.

Question 24

Which of the following best describes the relationship between the World Wide Web and the Internet? Responses A The World Wide Web is a protocol that is accessed using a data stream called the Internet. B The World Wide Web is a system of linked pages, programs, and files that is accessed using a data stream called the Internet. C The World Wide Web is a system of linked pages, programs, and files that is accessed via a network called the Internet. D The World Wide Web is a Web site that is accessed using a protocol called the Internet.

Answer 24

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

Question 25

Which of the following best explains how messages are typically transmitted over the Internet? Responses A The message is broken into packets that are transmitted in a specified order. Each packet must be received in the order it was sent for the message to be correctly reassembled by the recipient’s device. B The message is broken into packets. The packets can be received in any order and still be reassembled by the recipient’s device. C The message is broken into two packets. One packet contains the data to be transmitted and the other packet contains metadata for routing the data to the recipient’s device. D The message is transmitted as a single file and received in whole by the recipient’s device.

Answer 25

B The message is broken into packets. The packets can be received in any order and still be reassembled by the recipient’s device.

Question 26

Which of the following is LEAST likely to be a contributing factor to the digital divide? Responses A Some individuals and groups are economically disadvantaged and cannot afford computing devices or Internet connectivity. B Some individuals and groups do not have the necessary experience or education to use computing devices or the Internet effectively. C Some parents prefer to limit the amount of time their children spend using computing devices or the Internet. D Some residents in remote regions of the world do not have access to the infrastructure necessary to support reliable Internet connectivity.

Answer 26

C Some parents prefer to limit the amount of time their children spend using computing devices or the Internet.

Question 27

Which of the following actions is most likely to be effective in reducing the digital divide at a local level? Responses A Creating an application that offers coupons and discounts for local businesses B Offering a discount to utility customers who pay their bills online instead of by mail C Providing free community access to computers at schools, libraries, and community centers D Requiring applicants for local government jobs to complete an online application

Answer 27

C Providing free community access to computers at schools, libraries, and community centers

Question 28

Which of the following actions is most likely to help reduce the digital divide? Responses A Adding a requirement that all users of a popular social media site link their accounts with a phone number. B Deploying satellites and other infrastructure to provide inexpensive Internet access to remote areas of Earth C Digitizing millions of books from university libraries, making their full text available online D Offering improved Internet connections to Internet users who are willing to pay a premium fee for more bandwidth

Answer 28

B Deploying satellites and other infrastructure to provide inexpensive Internet access to remote areas of Earth

Question 29

Which of the following best explains how fault tolerance in a network is achieved? Responses A By providing high-bandwidth connections between devices, enabling data packets to be transmitted as quickly as possible B By providing multiple paths between devices, enabling routing to occur even in the presence of a failed component C By providing open network protocols, ensuring that all devices on the network are interacting in a standard way D By providing software to monitor all network traffic, ensuring that data packets are sent and received in the proper order

Answer 29

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

Question 30

Which of the following best explains how the Internet is a fault-tolerant system? Responses A The Internet is fault-tolerant because cybercriminals can conceal their actions, allowing them the ability to carry out faulty actions without leaving a trace. B The Internet is fault-tolerant because there are usually multiple paths between devices, allowing messages to sometimes be sent even when parts of the network fail. C The Internet is fault-tolerant because users can transmit messages using a variety of different protocols, allowing them to use devices from any manufacturer. D The Internet is fault-tolerant because users usually understand and accept the fact that servers sometimes fail, allowing network engineers to repair faulty devices as quickly as possible.

Answer 30

B The Internet is fault-tolerant because there are usually multiple paths between devices, allowing messages to sometimes be sent even when parts of the network fail.

Question 31

Which of the following is a primary benefit of making a computing system fault-tolerant? Responses A If one component of the system fails, users of the system can often still access it. B If one component of the system is hacked, no information will be stolen. C If the system becomes too expensive, making it fault-tolerant will save money. D If the system cannot operate efficiently, making it fault-tolerant will speed up its operation.

Answer 31

A If one component of the system fails, users of the system can often still access it.

Question 32

Which of the following statements best explains the ability of the network to provide fault tolerance? Responses A The network is considered fault-tolerant because there are redundant paths between each pair of devices. B The network is considered fault-tolerant because it guarantees that no individual component will fail. C The network is not considered fault-tolerant because it relies on physical connections. D The network is not considered fault-tolerant because it provides more paths than are needed.

Answer 32

A The network is considered fault-tolerant because there are redundant paths between each pair of devices.