Exam 9: Communications and Networks

____ can serve as sending and receiving devices in a communications system.

The main differentiation among network classifications is whether they are wired or wireless.

Current WiMAX standards have data transfer rates from 54 Mbps to 70 Mbps.

____________________ is a network standard that specifies no central computer or device on the network should control when data can be transmitted.

Figure 9-1 As shown in Figure 9-1, a(n) ____ is a network that covers a large geographic area, such as a city, country, or the world, using a communications channel that combines many types of media.

____________________ consists of materials or substances capable of carrying one or more signals.

A ____ is a legal agreement that permits users to install software on multiple computers, usually at a volume discount.

A(n) ____________________ is an earth-based reflective dish that contains the antenna, transceivers, and other equipment necessary for microwave communications.

A(n) ____________________ is a type of always-on connection that is established between two communications devices.

Figure 9-3 The type of peer-to-peer network shown in Figure 9-3, called a(n) ____________________, describes an Internet network on which users connect directly to each other s hard disks and exchange files over the Internet.

A(n) ____________________ is any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device.

A ____ network is a network topology that consists of a single central cable, to which all computers and other devices connect.

Using a dial-up line to connect computers costs more than making a regular telephone call.

A(n) ____________________ is a central communications device that allows computers and devices to transfer data wirelessly among themselves or to transfer data wirelessly to a wired network.

With ____ service, an optical terminal at your house receives the signals and transfers them to a router connected to your computer.

Fiber-optic cables have the capability of carrying significantly more signals than wire cables.

____ is a conversation that takes place over the Internet using a telephone connected to a desktop computer, mobile computer, or mobile device.

A(n) ____________________ is a collection of computers and devices connected together via communications devices and transmission media.

____ technology uses short-range radio waves to transmit data between two devices.

Star networks are difficult to install and maintain.