PROGRESSION: FIELD TECH ACTUAL EXAMS PACKAGE
DEAL QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS) | ALREADY
GRADED A+
Baseband signaling - ANSWER: is predominant in Ethernet networks.
two ways we can use a flow of energy to carry data - ANSWER: Analog and digital
Simplex - ANSWER: A signal may flow in only one direction. A commercial radio
station uses simplex communication, because listeners cannot transmit radio signals
back to the station.
Half-duplex - ANSWER: Signals may flow in either direction, but not simultaneously.
For example, a two-way radio allows only one user to speak at any one time.
Full-duplex - ANSWER: Signals may flow in both directions simultaneously. A
telephone is the best example of full-duplex communication. One wire brings a signal
from the telephone company to your home, and a second wire carries a separate
signal from your home back to the telephone company. Thus, you can both hear and
speak simultaneously.
Synchronous - ANSWER: The communicating parties or endpoints use time to
organize communication. In a data network, two communicating computers use
each clock "tick" to detect whether a digital bit is a 1 or 0. For example, as each time
interval passes, a computer checks the network cable to see whether the voltage is
high (binary 1) or low (binary 0). Because the timing determines the meaning of the
signal, it is essential that the endpoints are synchronized to the same clock before
sending signals.
Asynchronous - ANSWER: Bits are not transmitted on any strict timetable. For
example, a computer modem typically uses 8 bits to represent one character or
letter. To indicate the start of each character, the sending modem transmits a "start"
bit to alert the receiving end to the incoming signal. After the final bit of the eighth
character is transmitted, the sending modem transmits a "stop" bit to indicate the
end of the character. This process is repeated for each character the modem
transmits. Thus, the receiving modem must stay synchronized to the signal only for
the length of time it takes to transmit 8 bits. If the sending and receiving clocks are
slightly out of synchronization, these short data transfers will still be successful.
Which of the following is most typical of a broadband network? - ANSWER: Multiple
analog channels
Data bus size - ANSWER: The size of the bus refers to the number of data bits a CPU
can work on in a single instruction.
,Clock speed - ANSWER: The clock speed indicates how many instructions per second
the processor can execute. Each "tick" of the clock is called a cycle, thus clock speed
is measured in cycles per second. A single cycle per second is called 1 hertz (Hz),
1,000 Hz is 1 kilohertz (kHz), 1 million Hz is 1 megahertz (MHz), and 1 billion Hz is 1
gigahertz (GHz). A CPU that runs at 400,000,000 cycles per second is a 400- MHz
processor.
storage - ANSWER: used to describe media that hold data for longer periods, even
when the power goes off.
What components are common to all computer systems? (Check all that apply.) -
ANSWER: Processor
Memory
Storage
I/O
What does I/O stand for? - ANSWER: Input / Output
A NIC is a device used for: - ANSWER: Signaling
A sound card is what general type of computer component? - ANSWER: Input/output
Distributed applications - ANSWER: Applications can be distributed on the network
based on their requirements for resources. For example, an application that provides
computing-intensive services can be installed on a computer with very high
processing capacity, while the user's client application runs on a workstation that
provides high-end graphic display capabilities.
Resource sharing - ANSWER: A server process typically can serve many clients, thus
client/server architecture is a good way to share many types of resources across an
organization.
Applications - ANSWER: software programs used to perform work
Peer-to-peer networking software - ANSWER: is included with most popular desktop
OSs. Each individual user configures software settings to allow or disallow the
sharing of that computer's resources by other users. There is no central authority
that decides what users may have access to what resources.
A network OS (NOS) - ANSWER: also called a client/server OS, provides centralized
control of all network resources. A network administrator can decide what each user
may see and do on the network. By far, the most common NOS packages are
Microsoft and UNIX/Linux servers.
Which of the following is managed by the OS? - ANSWER: Keyboard input
Screen display
, File I/O
Peripheral control
The primary purpose of a device driver is to control hardware under the supervision
of the OS. True or False? - ANSWER: True
Most LANs - ANSWER: use star bus topologies.
Personal Area Networks (PAN) - ANSWER: are small and local. PANs connect by
means of Bluetooth wireless and can connect phones, tablets, mice, keyboards, and
more.
Local Area Networks (LAN) - ANSWER: can range from a few nodes in a home office,
to several hundred nodes in a corporation. However, a LAN is typically confined to a
single building.
Campus Area networks (CAN) - ANSWER: consist of LANs connected across multiple
buildings, using transmission links owned by the company that owns the network.
Metropolitan Area Networks (MAN) - ANSWER: are formed by connecting LANs in
several locations across a city or small region. The links between LANs are typically
leased from companies that provide telephony and data services.
Wide Area Networks (WAN) - ANSWER: are essentially the same as MANs, but span
longer distances. A WAN may include sites in the same country or multiple countries.
Global Area Networks (GAN) - ANSWER: are designed to allow users to have
unlimited uninterrupted network access anywhere around the globe via LAN,
wireless, cellular, and satellite connections.
Which of the following network topologies forms a closed loop? - ANSWER: Ring
topology
Which of the following network topologies connects devices to a shared straight-line
cable? - ANSWER: Bus topology
Twisted pair - ANSWER: is the most common type of copper cable used in networks.
There are two major ways to limit noise and crosstalk in a cable design: - ANSWER:
Shielding
Cancellation
Coaxial Ethernet networks must obey the "5/4/3 rule:" - ANSWER: Up to five
segments can be connected in a series between transmitter and receiver.
Up to four signal-repeating devices (repeaters, hubs, bridges, or switches) may be
used to connect segments.
A maximum of only three segments can contain Ethernet nodes.
DEAL QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS) | ALREADY
GRADED A+
Baseband signaling - ANSWER: is predominant in Ethernet networks.
two ways we can use a flow of energy to carry data - ANSWER: Analog and digital
Simplex - ANSWER: A signal may flow in only one direction. A commercial radio
station uses simplex communication, because listeners cannot transmit radio signals
back to the station.
Half-duplex - ANSWER: Signals may flow in either direction, but not simultaneously.
For example, a two-way radio allows only one user to speak at any one time.
Full-duplex - ANSWER: Signals may flow in both directions simultaneously. A
telephone is the best example of full-duplex communication. One wire brings a signal
from the telephone company to your home, and a second wire carries a separate
signal from your home back to the telephone company. Thus, you can both hear and
speak simultaneously.
Synchronous - ANSWER: The communicating parties or endpoints use time to
organize communication. In a data network, two communicating computers use
each clock "tick" to detect whether a digital bit is a 1 or 0. For example, as each time
interval passes, a computer checks the network cable to see whether the voltage is
high (binary 1) or low (binary 0). Because the timing determines the meaning of the
signal, it is essential that the endpoints are synchronized to the same clock before
sending signals.
Asynchronous - ANSWER: Bits are not transmitted on any strict timetable. For
example, a computer modem typically uses 8 bits to represent one character or
letter. To indicate the start of each character, the sending modem transmits a "start"
bit to alert the receiving end to the incoming signal. After the final bit of the eighth
character is transmitted, the sending modem transmits a "stop" bit to indicate the
end of the character. This process is repeated for each character the modem
transmits. Thus, the receiving modem must stay synchronized to the signal only for
the length of time it takes to transmit 8 bits. If the sending and receiving clocks are
slightly out of synchronization, these short data transfers will still be successful.
Which of the following is most typical of a broadband network? - ANSWER: Multiple
analog channels
Data bus size - ANSWER: The size of the bus refers to the number of data bits a CPU
can work on in a single instruction.
,Clock speed - ANSWER: The clock speed indicates how many instructions per second
the processor can execute. Each "tick" of the clock is called a cycle, thus clock speed
is measured in cycles per second. A single cycle per second is called 1 hertz (Hz),
1,000 Hz is 1 kilohertz (kHz), 1 million Hz is 1 megahertz (MHz), and 1 billion Hz is 1
gigahertz (GHz). A CPU that runs at 400,000,000 cycles per second is a 400- MHz
processor.
storage - ANSWER: used to describe media that hold data for longer periods, even
when the power goes off.
What components are common to all computer systems? (Check all that apply.) -
ANSWER: Processor
Memory
Storage
I/O
What does I/O stand for? - ANSWER: Input / Output
A NIC is a device used for: - ANSWER: Signaling
A sound card is what general type of computer component? - ANSWER: Input/output
Distributed applications - ANSWER: Applications can be distributed on the network
based on their requirements for resources. For example, an application that provides
computing-intensive services can be installed on a computer with very high
processing capacity, while the user's client application runs on a workstation that
provides high-end graphic display capabilities.
Resource sharing - ANSWER: A server process typically can serve many clients, thus
client/server architecture is a good way to share many types of resources across an
organization.
Applications - ANSWER: software programs used to perform work
Peer-to-peer networking software - ANSWER: is included with most popular desktop
OSs. Each individual user configures software settings to allow or disallow the
sharing of that computer's resources by other users. There is no central authority
that decides what users may have access to what resources.
A network OS (NOS) - ANSWER: also called a client/server OS, provides centralized
control of all network resources. A network administrator can decide what each user
may see and do on the network. By far, the most common NOS packages are
Microsoft and UNIX/Linux servers.
Which of the following is managed by the OS? - ANSWER: Keyboard input
Screen display
, File I/O
Peripheral control
The primary purpose of a device driver is to control hardware under the supervision
of the OS. True or False? - ANSWER: True
Most LANs - ANSWER: use star bus topologies.
Personal Area Networks (PAN) - ANSWER: are small and local. PANs connect by
means of Bluetooth wireless and can connect phones, tablets, mice, keyboards, and
more.
Local Area Networks (LAN) - ANSWER: can range from a few nodes in a home office,
to several hundred nodes in a corporation. However, a LAN is typically confined to a
single building.
Campus Area networks (CAN) - ANSWER: consist of LANs connected across multiple
buildings, using transmission links owned by the company that owns the network.
Metropolitan Area Networks (MAN) - ANSWER: are formed by connecting LANs in
several locations across a city or small region. The links between LANs are typically
leased from companies that provide telephony and data services.
Wide Area Networks (WAN) - ANSWER: are essentially the same as MANs, but span
longer distances. A WAN may include sites in the same country or multiple countries.
Global Area Networks (GAN) - ANSWER: are designed to allow users to have
unlimited uninterrupted network access anywhere around the globe via LAN,
wireless, cellular, and satellite connections.
Which of the following network topologies forms a closed loop? - ANSWER: Ring
topology
Which of the following network topologies connects devices to a shared straight-line
cable? - ANSWER: Bus topology
Twisted pair - ANSWER: is the most common type of copper cable used in networks.
There are two major ways to limit noise and crosstalk in a cable design: - ANSWER:
Shielding
Cancellation
Coaxial Ethernet networks must obey the "5/4/3 rule:" - ANSWER: Up to five
segments can be connected in a series between transmitter and receiver.
Up to four signal-repeating devices (repeaters, hubs, bridges, or switches) may be
used to connect segments.
A maximum of only three segments can contain Ethernet nodes.
