review 2 for exam
Which of the following best explains how data is typically assembled in packets for transmission over the Internet? A Each packet contains data to be transmitted, along with metadata containing information used for routing the data. B Each packet contains an encrypted version of the data to be transmitted, along with metadata containing the key needed to decrypt the data. C Each packet contains only the metadata used to establish a direct connection so that the data can be transmitted. D Each packet contains multiple data files bundled together, along with metadata describing how to categorize each data file.
A Each packet contains data to be transmitted, along with metadata containing information used for routing the data.
According to the domain name system (DNS), which of the following is a subdomain of the domain example.com? A about.example.com B example.co.uk C example.com.org D example.org
A about.example.com
Which of the following best explains how fault tolerance in a network is achieved? 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
B By providing multiple paths between devices, enabling routing to occur even in the presence of a failed component
Which of the following best explains how data is transmitted on the Internet? A Data is broken into packets, which are all sent to the recipient in a specified order along the same path. B Data is broken into packets, which can be sent along different paths. C All data is transmitted in a single packet through a direct connection between the sender and the recipient. D Multiple data files are bundled together in a packet and transmitted together.
B Data is broken into packets, which can be sent along different paths.
Which of the following actions is most likely to help reduce the digital divide? 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
B Deploying satellites and other infrastructure to provide inexpensive Internet access to remote areas of Earth
Internet protocol version 6 (IPv6) has been introduced to replace the previous version (IPv4). Which of the following best describes a benefit of IPv6 over IPv4? A IPv6 addresses are shorter than IPv4 addresses, which allows for faster routing of packets. B IPv6 allows for a greater number of addresses than IPv4, which allows more devices to be connected to the Internet. C IPv6 eliminates the use of hierarchy in addressing, making addresses easier to use. D IPv6 allows users to bypass older security protocols so that data can be sent peer-to-peer without the use of routers.
B IPv6 allows for a greater number of addresses than IPv4, which allows more devices to be connected to the Internet.
A state government is attempting to reduce the digital divide. Which of the following activities has the greatest potential to contribute to the digital divide rather than reducing it? A Providing programs that focus on technology literacy at local libraries B Requiring applicants for government jobs to apply using an online platform C Working with technology companies to offer computing devices at discounted prices to individuals with reduced incomes D Working with telecommunications companies to build network infrastructure in remote areas
B Requiring applicants for government jobs to apply using an online platform
Which of the following is a characteristic of the fault-tolerant nature of routing on the Internet? A The ability to use a hierarchical naming system to avoid naming conflicts B The ability to provide data transmission even when some connections have failed C The ability to resolve errors in domain name system (DNS) lookups D The ability to use multiple protocols such as hypertext transfer protocol (HTTP), Internet protocol (IP), and simple mail transfer protocol (SMTP) to transfer data
B The ability to provide data transmission even when some connections have failed
Which of the following best explains how messages are typically transmitted over the Internet? 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.
B The message is broken into packets. The packets can be received in any order and still be reassembled by the recipient's device.
Which of the following statements correctly explain how the Internet is able to facilitate communication at a large scale? 1. A central monitoring computer is used to track and maintain the connections of the Internet. 2. Data is routed between points in multiple ways so that if a connection fails, the data can be rerouted around the inoperative connections. 3. Protocols for packets and routing are used so that computers from different manufacturers can communicate in a standard way. A I and II only B I and III only C II and III only D I, II, and III
C II and III only
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? A Holding basic computer classes at community centers B Providing free wireless Internet connections at locations in low-income neighborhoods C Putting all government forms on the city Web site D Requiring that every city school has computers that meet a minimum hardware and software standard
C Putting all government forms on the city Web site
Which of the following best describes a direct benefit in using redundant routing on the Internet? A Redundancy enables messages to be transmitted with as few packets as possible. B Redundancy enables network devices to communicate with as few network connections as possible. C Redundancy often allows messages to be sent on the network even if some network devices or connections have failed. D Redundancy prevents network communications from being intercepted by unauthorized individuals.
C Redundancy often allows messages to be sent on the network even if some network devices or connections have failed.
Which of the following is LEAST likely to be a contributing factor to the digital divide? 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.
C Some parents prefer to limit the amount of time their children spend using computing devices or the Internet.
A local router is configured to limit the bandwidth of guest users connecting to the Internet. Which of the following best explains the result of this configuration as compared to a configuration in which the router does not limit the bandwidth? A The amount of time it takes guest users to send and receive large files is likely to decrease. B The number of packets required for guest users to send and receive data is likely to decrease. C Guest users will be prevented from having fault-tolerant routing on the Internet. D Guest users will be restricted in the maximum amount of data that they can send and receive per second.
D Guest users will be restricted in the maximum amount of data that they can send and receive per second.
