AP Computer science

The figure below represents a network of physically linked devices, labeled A through H. A line between two devices indicates a connection. Devices can communicate only through the connections shown. What is the minimum number of connections that would need to be removed from the network in order for device A to not be able to communicate with device F?

2

The figure below represents a network of physically linked computers labeled A through G. A line between two computers indicates that the computers can communicate directly with each other. Any information sent between two computers that are not directly connected must go through at least one other computer. For example, information can be sent directly between computers A and B, but information sent between computers A and C must go through other computers. What is the minimum number of connections that must be broken or removed in the network before computer E can no longer communicate with computer F?

3

Which of the following school policies is most likely to have a positive impact on the digital divide?

A school provides a laptop or tablet computer to all students enrolled at the school.

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? Select two answers.

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

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 actions is most likely to help reduce the digital divide?

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

Which of the following best explains how data is typically assembled in packets for transmission over the Internet?

Each packet contains data to be transmitted, along with metadata containing information used for routing the data.

The figure below represents a network of physically linked computers labeled A through G. A line between two computers indicates that the computers can communicate directly with each other. Any information sent between two computers that are not directly connected must go through at least one other computer. For example, information can be sent directly between computers A and B, but information sent between computers A and C must go through other computers. Which of the following statements about security in the network is true?

II only

The figure below represents a network of physically linked devices, labeled A through F. A line between two devices indicates a connection. Devices can communicate only through the connections shown. Which of the following statements are true about the ability for devices A and C to communicate? Select two answers.

If devices B and D were to fail, then information sent from device A could not reach device C. If devices D and F were to fail, then information sent from device A could not reach device C.

Which of the following is a primary benefit of making a computing system fault-tolerant?

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

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

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

Which of the following actions is most likely to be effective in reducing the digital divide at a local level

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

A city government is attempting to reduce the digital divide between groups with differing access to computing and the Internet. Which of the following activities is LEAST likely to be effective in this purpose?

Putting all government forms on the city Web site

Which of the following is LEAST likely to be a contributing factor to the digital divide?

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

Which of the following best explains how the Internet is a fault-tolerant system?

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.

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.

Which of the following is a characteristic of the fault-tolerant nature of routing on the Internet?

The ability to provide data transmission even when some connections have failed

Two computers are built by different manufacturers. One is running a Web server and the other is running a Web browser. Which of the following best describes the ability of the two computers to communicate with each other across the Internet?

The computers can communicate directly because Internet communication uses standard protocols.

A user enters a Web address in a browser, and a request for a file is sent to a Web server. Which of the following best describes how the file is sent to the user?

The file is broken into packets for transmission. The packets must be reassembled upon receipt.

Which of the following best explains how messages are typically transmitted over the Internet?

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

The following figure represents a network of physically linked devices labeled P through S. A line between two devices indicates a connection. Devices can communicate only through the connections shown. Which of the following statements best explains the ability of the network to provide fault tolerance?

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

According to the domain name system (DNS), which of the following is a subdomain of the domain example.com?

about.example.com