Exam 9: Communications and Networks

The ____ specifies how some wireless mobile devices such as smart phones and PDAs can display the content of Internet services such as the Web, e-mail, chat rooms, and newsgroups.

Cable television (CATV) wiring often uses twisted-pair cable because it can be cabled over longer distances than coaxial cable.

Figure 9-2 On a network such as the one illustrated in Figure 9-2, some servers, called ____________________, perform a specific task and can be placed with other servers to perform multiple tasks.

Case 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?

Only small networks use routers.

Figure 9-4 As shown in Figure 9-4, a ____ network is a network topology in which a cable forms a closed loop, with all computers and devices arranged along it.

A(n) ____ device is a device that initiates an instruction to transmit data, instructions, or information.

Ethernet and token ring LANs often use physical transmission media.

The amount of data, instructions, and information that can travel over a communications channel sometimes is called the ____.

A(n) ____ is a third-party business that provides networking services such as secure data and information transfer, storage, e-mail, and management reports.

Bus networks are unpopular on LANs because they are expensive and difficult to install.

Fiber-optic cables have all of the following advantages over cables that use wire except ____.

For the small business and home user, an ISDN line provides slower transfer rates than dial-up telephone lines.

Discuss what an intranet is, and include a definition of an extranet.

Figure 9-4 Define network topology, and discuss the most common types of topologies. Define which type of topology is in use in Figure 9-4.

____ is the time it takes a signal to travel from one location to another on a network.

The core of a(n) ____________________ consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signals.

The term ____________________ identifies any network based on the 802.11 family of standards.

What is TCP/IP and how does it work?

A DSL ____ sends digital data and information from a computer to a DSL line and receives digital data and information from a DSL line.