Question 1

The ARQ (automatic repeat request) algorithm is the basis for all data link control protocols in current use.

Accepted Answer

The ARQ algorithm is widely used for error control in data communication protocols. It is the basis for many popular protocols, such as TCP in the internet protocol suite.

Question 2

Internet Protocol (IP) is an inherently unreliable communication channel.

Accepted Answer

IP operates on a best-effort basis, meaning that it does not guarantee delivery or reliability of packets. Packets can be lost, delayed or delivered out of order. It is up to higher-level protocols and applications to manage reliability and error correction on top of IP.

Question 3

A single ISP would very likely be able to connect a single campus to every other computer in the world.

Accepted Answer

Even if a single ISP could provide internet connectivity to a single campus, it cannot directly connect every other computer in the world. The internet is a global network of interconnected networks operated by thousands of ISPs and organizations. Therefore, to reach a computer on the other side of the world, data has to traverse multiple networks, and not just a single ISP.

Question 4

Groupware is also known as electronic commerce.

Accepted Answer

Groupware and electronic commerce are two distinct concepts. Groupware refers to software that is designed to facilitate collaboration between individuals or groups, while electronic commerce refers to the buying and selling of goods and services over the internet.

Question 5

It is the job of the network layer protocols to create a "program-to-program" delivery service, in which messages are moved from a specific program at the source to a specific program at the destination.

Accepted Answer

The network layer is responsible for "host-to-host" delivery, not "program-to-program" delivery. The transport layer handles "program-to-program" delivery.

Question 6

The bus topology connects the network nodes in a circular fashion.

Accepted Answer

A bus topology connects network nodes along a single central cable, not in a circular fashion. A circular connection is characteristic of a ring topology.

Question 7

A mutually agreed upon set of rules, conventions, and agreements for the efficient and orderly exchange of information is called a protocol.

Accepted Answer

This is the definition of a protocol in the context of communication and networking. Protocols ensure that devices and systems can communicate effectively with one another.

Question 8

A digital subscriber line signal uses a different set of frequencies, and transmits analog rather than digital signals.

Accepted Answer

A digital subscriber line signal uses a different set of frequencies and transmits digital signals.

Question 9

A local Internet service provider (ISP) is called an Internet backbone.

Accepted Answer

An Internet backbone is a large-scale network infrastructure that connects multiple networks and serves as a major pathway for Internet traffic. Local ISPs connect to the backbone to provide service to their customers.

Question 10

Bridges and switches are the most widely used technique for constructing LANs.

Accepted Answer

The answer of Bridges and switches are the most widely...

Question 11

High-speed communications are necessary to support video on demand.

Accepted Answer

High-speed communications are necessary to support the streaming of high-quality video on demand. Slower connections may result in buffering, poor video quality, or other issues that detract from the user experience.

Question 12

The Internet protocol stack has six total layers.

Accepted Answer

The Internet protocol stack, also known as the TCP/IP model, has four layers: Application, Transport, Internet, and Network Access (or Link).

Question 13

During the early stages of network development, the only information exchanged was text such as email, database records, and technical papers.

Accepted Answer

During the early stages of network development, text-based communication such as email, database records, and technical papers were the primary means of exchanging information.

Question 14

A URL is the worldwide identification of a Web page located on a specific host computer on the Internet.

Accepted Answer

A URL (Uniform Resource Locator) is a unique address that identifies a website or a specific page on the internet. It includes the protocol (such as http or https), the domain name or IP address of the host computer, and the path to the webpage.

Question 15

The logical link control protocols determine how to arbitrate ownership of a shared line when multiple nodes want to send at the same time.

Accepted Answer

Logical Link Control (LLC) protocols are responsible for error checking and frame synchronization, not for arbitrating ownership of a shared line. Media Access Control (MAC) protocols handle the arbitration of shared line access.

Question 16

Internet Protocol (IP) is a transport layer protocol.

Accepted Answer

Internet Protocol (IP) is a network layer protocol.

Question 17

A bulletin board is a shared public file where anyone can post messages and everyone is free to browse and read the postings of others.

Accepted Answer

A bulletin board is indeed a shared public file where anyone can post messages and everyone is free to browse and read the postings of others.

Question 18

A gateway provides routing between different wide area networks.

Accepted Answer

This statement is true. A gateway is a networking device that provides routing between two different networks, such as between a local area network (LAN) and a wide area network (WAN). It acts as an entry and exit point for data packets traveling between the different networks.

Question 19

A digital subscriber line (DSL) uses the same wires that carry regular telephone signals.

Accepted Answer

DSL technology uses the same copper wires that carry phone calls, but it uses a different frequency range that allows for high-speed internet access while still allowing phone calls to be made.

Question 20

The Ethernet uses the ring topology.

Accepted Answer

The Ethernet uses the bus topology where all devices are connected to a single cable.

Quiz 7: Computer Networks, the Internet, and the Worldwide Web