AZ L-58 Communication Systems
Contractor Exam Questions And
Correct Answers (Verified Answers)
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1. Which of the following is the primary function of a structured cabling
system?
A. Increase wireless signal strength
B. Provide uniform cabling infrastructure for multiple devices
C. Reduce the need for power outlets
D. Enhance color coding of wires
B. Provide uniform cabling infrastructure for multiple devices
Rationale: Structured cabling provides a standardized infrastructure to
support multiple hardware uses, simplifying management and
maintenance.
2. What type of cable is most commonly used for Ethernet networks?
A. Coaxial
B. Fiber optic
C. Twisted pair
D. HDMI
C. Twisted pair
Rationale: Twisted pair cables, particularly Cat5e or Cat6, are the standard
for Ethernet networking due to their cost-effectiveness and data transfer
capability.
, 3. Which device is used to connect multiple network segments at the data
link layer?
A. Router
B. Switch
C. Hub
D. Modem
B. Switch
Rationale: A network switch operates at the data link layer to efficiently
direct traffic between devices within the same network.
4. What is the maximum recommended length for a Cat6 Ethernet cable
segment?
A. 50 meters
B. 100 meters
C. 150 meters
D. 200 meters
B. 100 meters
Rationale: Standards specify a maximum of 100 meters (328 feet) for
Cat5e/Cat6 cabling to ensure reliable data transmission.
5. Which wireless standard operates at 5 GHz frequency and provides
higher speeds over shorter ranges?
A. 802.11b
B. 802.11g
C. 802.11n
D. 802.11ac
D. 802.11ac
Rationale: The 802.11ac standard uses 5 GHz to deliver higher throughput
but with shorter effective range compared to 2.4 GHz bands.
6. A PBX system is used in a business to:
A. Enhance internet bandwidth
B. Provide internal telephone switching
C. Boost radio signals
D. Manage HVAC controls
, B. Provide internal telephone switching
Rationale: Private Branch Exchange (PBX) systems route internal calls
efficiently and manage external telephone connections.
7. What is the main advantage of using fiber optic cabling over copper
cabling?
A. Lower cost
B. Longer transmission distance and higher bandwidth
C. Easier termination
D. Greater flexibility for bending
B. Longer transmission distance and higher bandwidth
Rationale: Fiber optic cables transmit data at higher speeds over longer
distances without signal degradation compared to copper.
8. Which tool is used to test cable continuity and signal integrity in a
structured cabling system?
A. Multimeter
B. Cable tester
C. Crimper
D. Punch down tool
B. Cable tester
Rationale: Cable testers verify signal continuity, wiring faults, and proper
cable termination in networking installations.
9. What does RJ45 refer to in networking?
A. A wireless protocol
B. A type of network interface connector
C. A fiber optic standard
D. A data encryption method
B. A type of network interface connector
Rationale: RJ45 is the standard connector used for Ethernet twisted pair
cables.
10. What is the purpose of surge protection in communication
systems?
Contractor Exam Questions And
Correct Answers (Verified Answers)
Plus Rationale2026 Q&A| Instant
Download Pdf
1. Which of the following is the primary function of a structured cabling
system?
A. Increase wireless signal strength
B. Provide uniform cabling infrastructure for multiple devices
C. Reduce the need for power outlets
D. Enhance color coding of wires
B. Provide uniform cabling infrastructure for multiple devices
Rationale: Structured cabling provides a standardized infrastructure to
support multiple hardware uses, simplifying management and
maintenance.
2. What type of cable is most commonly used for Ethernet networks?
A. Coaxial
B. Fiber optic
C. Twisted pair
D. HDMI
C. Twisted pair
Rationale: Twisted pair cables, particularly Cat5e or Cat6, are the standard
for Ethernet networking due to their cost-effectiveness and data transfer
capability.
, 3. Which device is used to connect multiple network segments at the data
link layer?
A. Router
B. Switch
C. Hub
D. Modem
B. Switch
Rationale: A network switch operates at the data link layer to efficiently
direct traffic between devices within the same network.
4. What is the maximum recommended length for a Cat6 Ethernet cable
segment?
A. 50 meters
B. 100 meters
C. 150 meters
D. 200 meters
B. 100 meters
Rationale: Standards specify a maximum of 100 meters (328 feet) for
Cat5e/Cat6 cabling to ensure reliable data transmission.
5. Which wireless standard operates at 5 GHz frequency and provides
higher speeds over shorter ranges?
A. 802.11b
B. 802.11g
C. 802.11n
D. 802.11ac
D. 802.11ac
Rationale: The 802.11ac standard uses 5 GHz to deliver higher throughput
but with shorter effective range compared to 2.4 GHz bands.
6. A PBX system is used in a business to:
A. Enhance internet bandwidth
B. Provide internal telephone switching
C. Boost radio signals
D. Manage HVAC controls
, B. Provide internal telephone switching
Rationale: Private Branch Exchange (PBX) systems route internal calls
efficiently and manage external telephone connections.
7. What is the main advantage of using fiber optic cabling over copper
cabling?
A. Lower cost
B. Longer transmission distance and higher bandwidth
C. Easier termination
D. Greater flexibility for bending
B. Longer transmission distance and higher bandwidth
Rationale: Fiber optic cables transmit data at higher speeds over longer
distances without signal degradation compared to copper.
8. Which tool is used to test cable continuity and signal integrity in a
structured cabling system?
A. Multimeter
B. Cable tester
C. Crimper
D. Punch down tool
B. Cable tester
Rationale: Cable testers verify signal continuity, wiring faults, and proper
cable termination in networking installations.
9. What does RJ45 refer to in networking?
A. A wireless protocol
B. A type of network interface connector
C. A fiber optic standard
D. A data encryption method
B. A type of network interface connector
Rationale: RJ45 is the standard connector used for Ethernet twisted pair
cables.
10. What is the purpose of surge protection in communication
systems?
