PROGRESSION: FIELD TECH III - IV CONVENTIONAL NCTI
2023-2024 ACTUAL EXAM 300 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) | ALREADY GRADED A+
What is the name of the protocol by which management information for
a network element can be inspected or altered by a management station?
- ANSWER- Simple Network Management Protocol (SNMP).
Why does Simple Network Management Protocol (SNMP) use
unsolicited messages (traps) from the network elements to poll for
appropriate information? - ANSWER- Using traps is consistent with the
goal of simplicity and minimizing the amount of traffic generated by the
network management function.
What does the packet-based multimedia communications systems,
covered by the H.323, cover? - ANSWER- Realtime audio, video, and
data communications over Internet protocol (IP) packet networks.
Which version of the packet-based multimedia communications system,
covered by the H.323 standard, was the first to standardize requirements
for communications between a PC-based telephone and a telephone on
the switched circuit network (SCN) of the public telephone system? -
ANSWER- Version 2.
What component of the packet-based multimedia communications
system, covered by the H.323 standard, is considered to be the "brain" of
the network? - ANSWER- The gatekeeper.
In Simple Network Management Protocol (SNMP), when do passive
management agents take action on their own initiative? - ANSWERWhen certain well-defined error conditions occur they generate an
unsolicited message called a trap.
Which is the most important of the network troubleshooting steps? -
ANSWER- Identify the exact issue.
Ipconfig displays which of the following elements of client
configuration information? - ANSWER- Default gateway.
Which of the following is used to verify whether another host on a
transmission control protocol/Internet protocol (TCP/IP) network is
reachable? - ANSWER- Ping.
How would an operator find a list of options available for the ping
utility? - ANSWER- Type "ping" from a command line.
Which ping option allows you to specify the packet buffer size for each
ping packet? - ANSWER- Ping -l.
When troubleshooting, asking the question, "Has anything changed
recently that might have had an impact?", will aid you in: - ANSWERIdentifying the exact issue relating to a problem.
Which utility should be run to verify that your Windows client is
configured to use the correct Domain Name System (DNS) server? -
ANSWER- Ipconfig.
Which of the troubleshooting utilities presented expects a reply when it
sends a message to another computer? - ANSWER- Ping.
What entry would be made to log each hop along the way to a specific
Internet site? - ANSWER- Enter "tracert" followed by a host name for
the Internet site.
Which of the troubleshooting utilities presented is frequently used as a
starting point for transmission control protocol/Internet protocol
(TCP/IP) network problem isolation to learn what network a device
resides on? - ANSWER- Ipconfig.
How does frequency division multiplexing (FDM) enable multiple
signals to share a common medium? - ANSWER- By assigning each
signal a specific frequency or band of frequencies called a channel.
What best describes orthogonal frequency division multiplexing
(OFDM)? - ANSWER- It is a multicarrier transport scheme in which
narrowband carriers (subcarriers) are modulated independently, and then
multiplexed together.
In what type of installation is wide wavelength division multiplexing
(WWDM) used? - ANSWER- It is used in passive optical networks
(PON).
Coarse wavelength division multiplexing (CWDM) applications were
expanded to include use in large metropolitan networks, utilizing
wavelengths in what band?? - ANSWER- E-band.
The most commonly used dense wavelength division multiplexing
(DWDM) channels in broadband cable networks are in which band? -
ANSWER- The C-band (1,530 to 1,565 nm).
What determines the length of a time division multiplexing (TDM)
frame? - ANSWER- The number of input channels to the multiplexer.
What is an inefficient characteristic of synchronous time division
multiplexing (TDM) that is addressed by statistical TDM? - ANSWERTransport of empty time slots.
In a synchronous optical network (SONET) what is the basic building
block having a data transmission rate of 51.84 Mbps? - ANSWER- The
synchronous transport signal (STS) frame.
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