Chapter 3

Question 1

Which of the following is a (are) primary reason(s) for networking an organization’s computers together?

Answer 1

sharing of peripherals such as printers
sharing of data
enables client/server applications

Question 2

The following is are primary functions performed by a telecommunications network?

Answer 2

tracking of out-of-service devices
transmission of data
transmission of voice

Question 3

Which of the following most accurately describes the conversion function of telecommunications?

Answer 3

changing coding system or speed when moving data between devices on the network

Question 4

Which of the following most accurately describes the routing function of telecommunications?

Answer 4

choosing the most efficient path for a message to be sent over the Internet

Question 5

Which statement about Wi-Fi is true?

Answer 5

A) Wi-Fi is a wireless technology for local area networks.
B) Wi-Fi is used in buildings with wired LANs to enable mobile access to the organizational networks.
C) Wi-Fi networks use a CSMA/CA protocol to avoid message failures.

Question 6

Which of the following is not an advantage of a wireless LAN versus a wired LAN?

Answer 6

faster transmission speed and more secure

Question 7

Which transmission medium requires an unobstructed straight line between the transmitter and the receiver?

Answer 7

microwave

Question 8

Characteristics of fiber-optic transmission?

Answer 8

faster transmission than twisted pair of wires
more secure than other media because it does not emit radiation
not affected by power-line surges or electromagnetic interference

Question 9

Characteristic of a star network topology?

Answer 9

relatively easy to identify which cable has failed
if central device fails, whole network fails
easy to add additional devices

Question 10

Which type of technology relies on line-of-sight transmission?

Answer 10

satellite

Question 11

about active RFID tags

Answer 11

They can transmit information continuously, on request, or on a predetermined schedule.
They have their own power supply.
They are more expensive than passive tags.

Question 12

about Bluetooth

Answer 12

It is short-range radio technology built into a microchip.
It enables cellular communication with home appliances as well as permitting wireless communication between a computer and a mouse, keyboard, and printer.
Bluetooth technology standards are available free of royalties to any company that wishes to use them.

Question 13

The term Ethernet is often used as a synonym with which of the following types of local area networks:

Answer 13

contention bus network.

Question 14

Which statement describes a major difference between a LAN and a WAN?

Answer 14

A) usage by a corporation
B) geographic distance between devices being networked
C) usage of wireless media

Question 15

The CSMA/CD and CSMA/CA protocols are designed to manage which of the following:

Answer 15

message collisions.

Question 16

A private, packet-switched network using the public Internet is referred to as a(n):

Answer 16

VPN network

Question 17

statements about network topologies

Answer 17

A) A bus topology can be thought of as a simple “linear” topology.
B) A ring topology is wired like a bus, except the ends of the cable are connected.
C) In a mesh topology, devices are directly connected to two, three, or more other devices in a seemingly irregular pattern.

Question 18

A broadband service offered by telephone companies that uses copper wires already installed in homes and offices to connect to the Internet is referred to as:

Answer 18

DSL.

Question 19

When considering network protocols, why is the multilayer OSI model still important?

Answer 19

It provides a conceptual framework for how communication takes place in networks.

Question 20

Which of the following OSI model layers receives a packet of data from the transport layer and adds header data to it to identify the route the packet is to take to its destination?

Answer 20

network

Question 21

Which of the following network protocols is used on the Internet and has become the de facto standard protocol for networking around the world?

Answer 21

TCP/IP

Question 22

By 2004, the number of cell phones in use in the United States was greater than the number of wired phones in homes

Answer 22

True

Question 23

Using an Infrastructure as a Service provider can enable an organization to avoid major capital investments for network equipment as well as computer servers and storage.

Answer 23

True

Question 24

When data can be transmitted in both directions on a telecommunications line, but not simultaneously, the transmission type is referred to as ____________________.

Answer 24

half-duplex

Question 25

A Universal Resource Locator (URL) is used to locate packets in a network.

Answer 25

False; A URL is the address of a particular Web site, and is used to jump to that Web site.