NCTI Progression Field Tech 3-4 FINAL
EXAM: Certified Exam Study *Q&A*
(100% Correct) 2025/2026 |VERIFIED|
What is the main purpose of a fiber optic cable in telecommunications?
signals over extensive distances with minimal signal degradation.
Explain the function of a splice tray ...
NCTI Progression Field Tech 3-4 FINAL
EXAM: Certified Exam Study *Q&A*
(100% Correct) 2025/2026 |VERIFIED|
What is the main purpose of a fiber optic cable in telecommunications? It carries data as light
signals over extensive distances with minimal signal degradation.
Explain the function of a splice tray in fiber optic installations. A splice tray arranges and
safeguards fiber splices, ensuring that the fibers are securely held and can be easily accessed for
maintenance.
Why is conducting a visual inspection on fiber optic connections important? A visual inspection
helps detect physical damage, such as breaks or misalignments, which can adversely affect signal quality.
What is the function of an OTDR in testing fiber optics? An OTDR (Optical Time Domain
Reflectometer) assesses the light reflected from various points in a fiber to locate faults and splices.
How does signal degradation occur in coaxial cables? Signal degradation arises from resistance,
capacitance, and external interference, leading to a weaker signal at the receiving end.
What is the typical wavelength for single-mode fiber optics? The standard wavelengths for single-
mode fiber are 1310 nm and 1550 nm.
Describe the process of fusion splicing in fiber optics. Fusion splicing involves melting the ends of
two fibers together to create a seamless optical connection, minimizing loss.
What primary factors influence wireless network performance? Factors include signal strength,
interference from other devices, physical barriers, and environmental conditions.
1
,What is the significance of dB (decibel) in measuring signals? Decibels provide a means to
quantify the power level ratios in signals, facilitating comparisons and evaluations of signal strength and
losses.
Elaborate on the concept of bandwidth in telecommunications. Bandwidth represents the
maximum data transfer rate of a network, affecting the volume of data transmitted over a specific time
frame.
What is a patch panel's role in networking? A patch panel organizes and connects multiple
network cables, making management and troubleshooting more straightforward.
Define latency regarding network performance. Latency is the delay before data starts
transferring across a network, impacting application responsiveness.
What does POE stand for, and what is its purpose? POE (Power over Ethernet) enables network
cables to deliver both data and electrical power to devices such as cameras and phones.
How can you identify a faulty cable in a network setup? A faulty cable can be detected by testing
for continuity, checking for signal loss, or using a cable tester to confirm connections.
What role does a media converter play in a network? A media converter allows different types of
network media to connect, such as converting fiber optic signals to Ethernet.
Explain the importance of network topology. Network topology describes the physical and logical
layout of devices in a network, influencing performance and ease of troubleshooting.
What is DHCP's role in a network? DHCP (Dynamic Host Configuration Protocol) automatically
assigns IP addresses to devices on a network, streamlining network management.
Why is grounding important in telecommunications installations? Proper grounding safeguards
against electrical surges and interference, ensuring the safety and reliability of network equipment.
2
, What are the common standards for Ethernet cabling? Common Ethernet standards include
Cat5e, Cat6, and Cat6a, each providing different speeds and bandwidth capabilities.
What does "throughput" refer to in networking? Throughput is the actual rate at which data is
successfully transmitted over a network, affected by various factors like congestion.
What is the primary purpose of network monitoring tools? Network monitoring tools track
performance metrics, identify issues, and offer insights for optimizing network health.
Describe the concept of network redundancy. Network redundancy involves implementing
multiple pathways or connections to ensure continued operation if one fails.
What are the characteristics of a mesh network? A mesh network consists of interconnected
nodes that communicate with one another, offering robust connectivity and redundancy.
What is an IP address, and why is it critical? An IP address uniquely identifies a device on a
network, facilitating communication and data exchange between devices.
How can you secure a wireless network? Securing a wireless network includes using strong
passwords, enabling encryption protocols, and regularly updating firmware to prevent unauthorized
access.
What is the purpose of VLANs in network management? VLANs (Virtual Local Area Networks)
divide a network into separate sub-networks, enhancing performance and security by regulating traffic
flow.
What does "signal-to-noise ratio" mean in telecommunications? Signal-to-noise ratio compares
the strength of the desired signal to background noise, influencing the clarity and reliability of
communications.
How does temperature affect the performance of network equipment? Extreme temperatures
can compromise equipment reliability, leading to overheating or malfunctions, which may cause network
failures.
3
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