Exam 9: Communications and Networks

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. If you are charged with setting up a network for your team and there is one device whose reliability you are concerned about, which of the following network topologies is a bad idea for you?

With which of the following do users type and send short text messages on a smart phone or mobile device?

COGNITIVE ASSESSMENT Which company manufactures a broad line of networking equipment, which is the basis for the Internet and most private networks?

The ____________________ is the worldwide telephone system that handles voice-oriented telephone calls.

As shown in the accompanying figure, what is the term for 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?

COGNITIVE ASSESSMENT What is another term for servers that control access to the hardware, software, and other network resources?

All cybercafés also are hot spots.

With TCP/IP, each packet contains data as well as the recipient (destination), origin (sender), and the sequence information used to reassemble the data at the destination.

As illustrated in the accompanying figure, on what kind of network must all of the computers and devices (nodes) on the network connect to a central device?

COGNITIVE ASSESSMENT Which of the following are examples of hot spot technologies?

When users log off a P2P network like the one in the accompanying figure, other users still can access their hard disks.

COGNITIVE ASSESSMENT What is an example of a communications device that connects a communications channel to a sending or receiving device?

Wireless access points have high-quality antennas for optimal signals.

____________________ is a set of standards for digital transmission of data over standard copper telephone lines.

Discuss what a T carrier line is, including the different types and their speeds.

Although it can connect any number of computers, a client/server network typically provides an efficient means to connect 10 or fewer computers.

ADSL is ideal for Internet access because most users upload more information than they download from the Internet.

COGNITIVE ASSESSMENT What is the purpose of hubs and switches?

Communications software usually is bundled with the operating system or purchased network devices.

COGNITIVE ASSESSMENT Which network type connects each computer and device to a central device, such as a hub or a switch?