Progression: Field Tech IV – V Exam
Questions With Correct 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
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
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.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Brightstars. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
