Exam 9: Communications and Networks

The quality and consistency of the connection on a dedicated line are worse than a dial-up line because dedicated lines provide a temporary connection.

Which of the following is a device that provides a central point for cables in a network?

COGNITIVE ASSESSMENT What is the term for a communications device that connects multiple computers together and transmits data to its correct destination on a network?

A(n) ____________________ device is a device that accepts the transmission of data, instructions, or information.

COGNITIVE ASSESSMENT What is the term for a home network that includes features such as lighting control, thermostat adjustments, and a security system?

COGNITIVE ASSESSMENT Your school computer library has a network that connects computers and devices within a few small rooms. What type of network does it likely use?

In ____________________ wire, each cable consists of two separate insulated copper wires that are twisted together.

Which of the following is a wireless network that provides Internet connections to mobile computers and other devices?

Which of the following is a simple, inexpensive network that typically connects fewer than 10 computers?

A MAN typically includes one or more WANs like those shown in the accompanying figure, but covers a smaller geographic area than a LAN.

A dial-up modem connected to a sending computer converts the computer's digital signals into analog signals.

The type of peer-to-peer network shown in the accompanying figure, describes an Internet network on which users connect directly to each other's hard disks and exchange files over the Internet. What is this kind of network called?

Critical Thinking Questions Case 9-2 The area of network communications standards is an area with which you are not familiar, so you have decided to study it in some detail. You expect to have to network a wide range of devices in the near future, so this is a timely subject of study. You are looking for a way to transmit signals through a door, and with a high transfer rate, because you have some video to transfer from a digital video camera. Which of the following protocols is the best bet for you?

For any home user, the hardware and software of an Ethernet network is easy to configure.

Which of the following kinds of cable consists of a single copper wire surrounded by at least three layers: an insulating material, a woven or braided metal, and a plastic outer coating?

COGNITIVE ASSESSMENT GoToMeeting and WebEX are examples of what kind of software?

Which of the following is a conversation that takes place over the Internet using a telephone connected to a computer, mobile device, or telephone adapter?

COGNITIVE ASSESSMENT What is a NIC?

SMS capability allows users to send and receive graphics, pictures, video clips, and sound files as well as short text messages.

An extranet essentially is a small version of the Internet that exists within an organization.