Progression: Field Tech IV – V Revision
Exam Questions And Already Passed
Answers.
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.
Exam Questions And Already Passed
Answers.
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.
