, Solution and Answer Guide: Data Communication and Computer Networks A Business User's Approach, 9th Edition Jill West, Curt
M. White 9780357504406;
SOLUTION MANUAL FOR DATA COMMUNICATION AND COMPUTER
NETWORKS A BUSINESS USERS APPROACH 9TH EDITION JILL
WEST, CURT M WHITE
Chapter 1: Introduction to Data Communications and Computer Networks
Table of Contents
Review Questions Answers ......................................................................................................... 1
Hands-On Project Solutions ........................................................................................................ 6
Reflection Discussion 1 Rubric .................................................................................................... 7
Review Questions Answers
1. You are sitting at the local coffee shop, enjoying your favorite latte. You pull out your laptop and,
using the wireless network available at the coffee shop, access your email. Which portion of the
electromagnetic spectrum is your laptop most likely using?
a. Ultraviolet waves
b. Visible light waves
c. Radio waves
d. X-rays
Answer: c. Radio waves
Explanation: Wireless computer networks use different kinds of low energy radiation below
the visible light spectrum and can involve broadcast radio, microwaves, or infrared
transmissions.
2. Which of the following characteristics distinguishes a PAN from other types of networks?
a. A printer is connected to the network.
b. The network is intended to be used by one person at a time.
c. The network supports wearable devices.
d. The network is small in geographical coverage.
Answer: b. The network is intended to be used by one person at a time.
Explanation: Networks spanning an area of a few centimeters to several meters around an
individual are called PANs (personal area networks) and are typically used by one person at
a time.
3. When you set up a network at your home with a home router, a few computers, a printer,
multimedia devices, and your smartphone, which of the following statements is true?
a. You can have several PANs, you have one LAN, and you probably have one WAN
connection.
b. You can have several LANs, you have one PAN, and you probably have one WAN
connection.
c. You can have several WANs, you have one MAN, and you probably have one LAN
connection.
d. You can have several PANs, you have one MAN, and you probably have one LAN
connection.
Answer: a. You can have several PANs, you have one LAN, and you probably have one
WAN connection.
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, Solution and Answer Guide: Chapter 1: Introduction to Data Communications and Computer Networks
Explanation: A home network might include multiple work areas, each with its own PAN. The
entire home network is one LAN. The home router supports one WAN connection to the
Internet.
4. Your company’s network administrator mentions during a meeting that she has migrated your
company’s database to a DBaaS. What can you deduce about the database, given just this
information?
a. The database has been backed up.
b. The database is now more secure than it was.
c. The database is stored on a cloud provider’s servers.
d. The database has been archived.
Answer: c. The database is stored on a cloud provider’s servers.
Explanation: The phrase ―anything as a service‖ refers to cloud computing services and is
often adapted to refer to specific types of cloud services, such as DBaaS (database as a
service). When using a cloud service, the actual data or code does not exist on the user’s
computer or datacenter but runs on the cloud provider’s servers and is typically accessed
across the Internet through the user’s browser.
5. When your work computer requests a web page, which device does the computer communicate
with first?
a. Web server
b. Local server
c. Router
d. Switch
Answer: d. Switch
Explanation: A switch is the collection point for the wires that interconnect the workstations
on a LAN. The switch then connects to the router to access the Internet. The router sends the
request across the Internet to a remote web server. A local server would not have the web
page files available.
6. As you’re setting up your home network, you connect one desktop and two laptops to your home
router. You then connect your home router to your cable modem. When you test the connection
with your desktop, the computer can access websites on the Internet. What functions is your
home router providing for your home network?
a. Web server and file server
b. Web server and router
c. Switch and web server
d. Router and switch
Answer: d. Router and switch
Explanation: A switch is the collection point for the wires that interconnect the workstations
on a LAN. A router is the connecting device between LANs and WANs, such as the Internet.
Most home routers provide both these functions in one device.
7. What computer ―language‖ is spoken over the Internet?
a. WAN
b. NaaS
c. TCP/IP
d. DSL
Answer: c. TCP/IP
Explanation: The language of the Internet is TCP/IP (Transmission Control Protocol/Internet
Protocol).
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website, in whole or in part.
, Solution and Answer Guide: Chapter 1: Introduction to Data Communications and Computer Networks
8. Using a laptop computer with a wireless connection to your company’s LAN, you download a web
page from the Internet. Which of the following statements can you know is true, given this
information?
a. Your web page request crossed at least two LANs.
b. Your web page request crossed exactly one LAN.
c. Your web page request was handled by exactly one router.
d. Your web page request was handled by exactly one switch.
Answer: a. Your web page request crossed at least two LANs.
Explanation: No direct connection exists between the laptop computer and the web server.
The laptop computer connects to your company’s LAN. The request is sent across the
Internet, reaches the web server’s LAN, and is then directed to the computer hosting the web
server software. During the trip, the request probably crossed a switch on each end’s LAN
and several routers on the Internet.
9. Your coworker, Raul, has stored a few documents on his workstation that you and several others
in your office access regularly as you’re writing emails to customers. What function is Raul’s
computer filling?
a. Web server
b. Switch
c. Email server
d. File server
Answer: d. File server
Explanation: In a client/server system, a user at a computer, called the client machine,
issues a request for some form of data or service, such as a request for a file from a file
server. The computer where the files are stored is a file server, and the computer requesting
the file is the client.
10. Your family-owned business is growing and has just added a few new employees. The owners
decide, for security purposes, that the network needs to be segmented so that only certain people
can get to sensitive data. Which of these changes will accomplish this goal most effectively?
a. Add a new WAN.
b. Divide the network into two LANs.
c. Divide the network into two WANs.
d. Add a new PAN.
Answer: b. Divide the network into two LANs.
Explanation: A switch can be used to segment a network into two or more LANs, which can
limit the flow of traffic between the LANs.
11. As you’re riding the bus to work, you check your email on your smartphone. Your smartphone is
using the cellular network to access the email server at your company’s datacenter. What kind of
network is this?
a. Local area network
b. Personal area network
c. Body area network
d. Wide area network
Answer: d. Wide area network
Explanation: When a user talks into a smartphone, sends a text message or email, or
interacts with a website, the data is transmitted across the cellular network to a telephone
company building. The telephone company then transfers the smartphone’s data over the
public telephone network or through a connection onto the Internet, both of which are WANs.
12. Which of the following is not an example of a sensor network?
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