Solu琀椀ons
Table of Contents
Review Questions Answers.........................................................................................................................1
Hands-On Project Solutions........................................................................................................................7
Reflection Discussion 1 Rubric...................................................................................................................9
Review Ques琀椀ons 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.
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).
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?
a. A doorbell sends an alert to the homeowner’s smartphone when movement is detected.
b. A security camera records some burglars robbing a gas station.
c. A robot rejects a circuit board that does not meet manufacturing standards.
d. An alarm sounds when water is detected on the datacenter floor.
Answer: b. A security camera records some burglars robbing a gas station.
Explanation: Sensor networks respond to information gathered from embedded sensors. A security
camera that runs continuously and passively records without activating any kind of response does not
qualify as a sensor network.
13. Peggy owns a MacBook but needs to install and use an application that only works on the Windows
operating system. How can she use the hardware she has to install and use the application?
a. Wipe the macOS off her MacBook and install Windows instead.
b. Spin up a macOS VM in the cloud and install the application on the VM.
c. Create a VM on the MacBook and install Windows and the application on the VM.
d. Change the hard drive on her MacBook and install Windows and the application on the new hard
drive.
, Answer: c. Create a VM on the MacBook and install Windows and the application on the VM.
Explanation: Running a hypervisor on the MacBook, you can create a virtual machine (VM), and then
install Windows and the application on the VM.
14. Which OSI layers does the TCP/IP architecture combine into one?
a. Physical and network
b. Network and application
c. Application, transport, and physical
d. Application, presentation, and session
Answer: d. Application, presentation, and session
Explanation: The OSI model breaks down the TCP/IP application layer into three separate layers:
application, presentation, and session.
15. Which of the following protocols functions at the transport layer?
a. HTTP
b. TCP
c. IP
d. SSH
Answer: b. TCP
Explanation: The transport layer often uses TCP to perform end-to-end error control and end-to-end
flow control.
16. Which of the following devices relies on IP addresses to send messages from network to network toward
their destination?
a. Routers
b. Switches
c. Servers
d. Workstations
Answer: a. Routers
Explanation: To choose a path through the network, routers at the network layer determine routing
information, which is applied to each packet or group of packets as they move from one network to
another on the Internet or within a set of corporate networks.
17. As you chat with a friend on social media, what type of connection maintains the immediacy of the
conversation?
a. Physical connection
b. Logical connection
c. Network connection
d. Data link connection
Answer: b. Logical connection
Explanation: A logical connection is a nonphysical connection between sender and receiver that
allows an exchange of commands and responses. The messages themselves must cycle through the
various communications layers to move from one device to the next across the Internet and be
delivered to the recipient’s social media account. The back-and-forth conversation between the two
users retains the semblance of a consistent connection superficially, but the two accounts do not
connect directly with each other.
18. In what part of a message on the Internet can a router find the destination IP address?
a. Data link layer header
b. Application layer header
c. Transport layer header
Table of Contents
Review Questions Answers.........................................................................................................................1
Hands-On Project Solutions........................................................................................................................7
Reflection Discussion 1 Rubric...................................................................................................................9
Review Ques琀椀ons 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.
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).
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?
a. A doorbell sends an alert to the homeowner’s smartphone when movement is detected.
b. A security camera records some burglars robbing a gas station.
c. A robot rejects a circuit board that does not meet manufacturing standards.
d. An alarm sounds when water is detected on the datacenter floor.
Answer: b. A security camera records some burglars robbing a gas station.
Explanation: Sensor networks respond to information gathered from embedded sensors. A security
camera that runs continuously and passively records without activating any kind of response does not
qualify as a sensor network.
13. Peggy owns a MacBook but needs to install and use an application that only works on the Windows
operating system. How can she use the hardware she has to install and use the application?
a. Wipe the macOS off her MacBook and install Windows instead.
b. Spin up a macOS VM in the cloud and install the application on the VM.
c. Create a VM on the MacBook and install Windows and the application on the VM.
d. Change the hard drive on her MacBook and install Windows and the application on the new hard
drive.
, Answer: c. Create a VM on the MacBook and install Windows and the application on the VM.
Explanation: Running a hypervisor on the MacBook, you can create a virtual machine (VM), and then
install Windows and the application on the VM.
14. Which OSI layers does the TCP/IP architecture combine into one?
a. Physical and network
b. Network and application
c. Application, transport, and physical
d. Application, presentation, and session
Answer: d. Application, presentation, and session
Explanation: The OSI model breaks down the TCP/IP application layer into three separate layers:
application, presentation, and session.
15. Which of the following protocols functions at the transport layer?
a. HTTP
b. TCP
c. IP
d. SSH
Answer: b. TCP
Explanation: The transport layer often uses TCP to perform end-to-end error control and end-to-end
flow control.
16. Which of the following devices relies on IP addresses to send messages from network to network toward
their destination?
a. Routers
b. Switches
c. Servers
d. Workstations
Answer: a. Routers
Explanation: To choose a path through the network, routers at the network layer determine routing
information, which is applied to each packet or group of packets as they move from one network to
another on the Internet or within a set of corporate networks.
17. As you chat with a friend on social media, what type of connection maintains the immediacy of the
conversation?
a. Physical connection
b. Logical connection
c. Network connection
d. Data link connection
Answer: b. Logical connection
Explanation: A logical connection is a nonphysical connection between sender and receiver that
allows an exchange of commands and responses. The messages themselves must cycle through the
various communications layers to move from one device to the next across the Internet and be
delivered to the recipient’s social media account. The back-and-forth conversation between the two
users retains the semblance of a consistent connection superficially, but the two accounts do not
connect directly with each other.
18. In what part of a message on the Internet can a router find the destination IP address?
a. Data link layer header
b. Application layer header
c. Transport layer header
