Exam 9: Communications and Networks

COGNITIVE ASSESSMENT What term describes a coffeehouse that provides Internet access to users with mobile computers and devices?

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

Which of the following is a transmission media on which data, instructions, or information travel?

In a fiber-optic cable, each strand, called an optical fiber, is as thin as a human hair.

COGNITIVE ASSESSMENT What computer communications standard did Robert Metcalfe coinvent?

COGNITIVE ASSESSMENT What term describes software the helps people work together on projects and share information over a network?

What is TCP/IP and how does it work?

COGNITIVE ASSESSMENT You love to take pictures of your family. What standard do you use to print pictures directly from your camera?

Critical Thinking Questions Case 9-1 You have taken a new job as a network administrator. Although you have been an IT professional within your organization for a number of years, this particular responsibility is a new one for you, so you have been studying network topologies, for example. You are very confident about the hub you are going to use in your new network-it's brand-new and highly recommended by some colleagues that you trust. Which of the following network topologies is a good choice for you?

With ISDN, the same telephone line that could carry only one computer signal now can carry three or more signals at once through the same line, using a technique called multiplexing.

A MAN usually is managed by a consortium of users or by a single network provider that sells the service to the users.

COGNITIVE ASSESSMENT Which of the following statements is not true of peer-to-peer networks?

On what kind of network, such as that illustrated in the accompanying figure, do one or more computers act as a server and the other computers on the network request services from the server?

Microwave transmission involves sending signals from one microwave station to another. What is this often called?

COGNITIVE ASSESSMENT Print servers, file servers, and database servers are examples of what type of server?

Which of the following is an earth-based reflective dish that contains the antenna, transceivers, and other equipment necessary for microwave communications?

COGNITIVE ASSESSMENT Which of the following statements is not true of Wi-Fi?

Which of the following is true of broadcast radio with regard to physical transmission media?

Which of the following is the greatest risk to a bus network?

Which of the following is a network standard that specifies no central computer or device on the network should control when data can be transmitted?