WA ADMINISTRATOR 09 TELECOMMUNICATIONS
PRACTICE QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF
1. Which of the following is the primary function of a PBX system?
A. To provide wireless connectivity
B. To manage internal and external telephone calls within an
organization
C. To transmit digital television signals
D. To enhance satellite communications
Rationale: A PBX (Private Branch Exchange) routes and manages both
internal and external phone calls for organizations.
2. What type of cable is commonly used for Ethernet connections in
LANs?
A. Coaxial cable
B. Fiber optic cable
C. Twisted pair cable (Cat5e/Cat6)
D. Shielded radio cable
Rationale: Twisted pair cables like Cat5e or Cat6 are standard for
Ethernet LAN networks due to low cost and reliability.
3. The term “VoIP” refers to which of the following?
A. Virtual Optical Internet Protocol
B. Voice over Internet Protocol
C. Virtual Office Internet Path
,D. Voice optical integrated path
Rationale: VoIP transmits voice data using Internet Protocol, allowing
phone service over data networks.
4. What device converts digital signals to analog for transmission over a
phone line?
A. Switch
B. Modem
C. Router
D. Transceiver
Rationale: A modem (modulator-demodulator) converts between digital
and analog signals for communication.
5. Which of the following is the correct frequency range for typical Wi-
Fi (802.11b/g/n) operation?
A. 2.4 GHz
B. 5.8 GHz
C. 1.2 GHz
D. 900 MHz
Rationale: Standard Wi-Fi operates on the 2.4 GHz band (and
sometimes 5 GHz for newer standards).
6. A telecommunications administrator needs to ensure network
uptime. Which redundancy method is most appropriate?
A. Serial switching
B. Failover system
C. Virtual addressing
D. Frequency hopping
,Rationale: Failover systems provide redundancy by automatically
switching to a backup system if the primary fails.
7. What is the main function of a router in a telecommunications
network?
A. Boost signal strength
B. Encrypt data packets
C. Direct data packets between networks
D. Store backup data
Rationale: Routers determine the best path and forward packets
between different networks.
8. Which organization regulates telecommunications licensing in
Washington State?
A. FCC
B. Washington Utilities and Transportation Commission (UTC)
C. ITU
D. OSHA
Rationale: The WA UTC oversees telecommunications regulation and
licensing within the state.
9. Which component of a fiber optic network is responsible for
converting light signals into electrical signals?
A. Multiplexer
B. Optical receiver
C. Repeater
D. Transceiver
, Rationale: The optical receiver decodes light pulses back into electrical
data signals.
10. What is a primary advantage of using fiber optic cable over copper
cable?
A. Lower cost
B. Easier installation
C. Higher bandwidth and lower signal loss
D. Higher power capacity
Rationale: Fiber optic cables offer superior bandwidth and minimal
signal attenuation over long distances.
11. What does the acronym DSL stand for?
A. Data System Link
B. Digital Subscriber Line
C. Dynamic Service Line
D. Digital System Link
Rationale: DSL provides broadband Internet access over standard
telephone lines.
12. Which layer of the OSI model is responsible for routing?
A. Data Link
B. Transport
C. Network
D. Physical
Rationale: The Network layer handles addressing and routing data
between networks.
PRACTICE QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF
1. Which of the following is the primary function of a PBX system?
A. To provide wireless connectivity
B. To manage internal and external telephone calls within an
organization
C. To transmit digital television signals
D. To enhance satellite communications
Rationale: A PBX (Private Branch Exchange) routes and manages both
internal and external phone calls for organizations.
2. What type of cable is commonly used for Ethernet connections in
LANs?
A. Coaxial cable
B. Fiber optic cable
C. Twisted pair cable (Cat5e/Cat6)
D. Shielded radio cable
Rationale: Twisted pair cables like Cat5e or Cat6 are standard for
Ethernet LAN networks due to low cost and reliability.
3. The term “VoIP” refers to which of the following?
A. Virtual Optical Internet Protocol
B. Voice over Internet Protocol
C. Virtual Office Internet Path
,D. Voice optical integrated path
Rationale: VoIP transmits voice data using Internet Protocol, allowing
phone service over data networks.
4. What device converts digital signals to analog for transmission over a
phone line?
A. Switch
B. Modem
C. Router
D. Transceiver
Rationale: A modem (modulator-demodulator) converts between digital
and analog signals for communication.
5. Which of the following is the correct frequency range for typical Wi-
Fi (802.11b/g/n) operation?
A. 2.4 GHz
B. 5.8 GHz
C. 1.2 GHz
D. 900 MHz
Rationale: Standard Wi-Fi operates on the 2.4 GHz band (and
sometimes 5 GHz for newer standards).
6. A telecommunications administrator needs to ensure network
uptime. Which redundancy method is most appropriate?
A. Serial switching
B. Failover system
C. Virtual addressing
D. Frequency hopping
,Rationale: Failover systems provide redundancy by automatically
switching to a backup system if the primary fails.
7. What is the main function of a router in a telecommunications
network?
A. Boost signal strength
B. Encrypt data packets
C. Direct data packets between networks
D. Store backup data
Rationale: Routers determine the best path and forward packets
between different networks.
8. Which organization regulates telecommunications licensing in
Washington State?
A. FCC
B. Washington Utilities and Transportation Commission (UTC)
C. ITU
D. OSHA
Rationale: The WA UTC oversees telecommunications regulation and
licensing within the state.
9. Which component of a fiber optic network is responsible for
converting light signals into electrical signals?
A. Multiplexer
B. Optical receiver
C. Repeater
D. Transceiver
, Rationale: The optical receiver decodes light pulses back into electrical
data signals.
10. What is a primary advantage of using fiber optic cable over copper
cable?
A. Lower cost
B. Easier installation
C. Higher bandwidth and lower signal loss
D. Higher power capacity
Rationale: Fiber optic cables offer superior bandwidth and minimal
signal attenuation over long distances.
11. What does the acronym DSL stand for?
A. Data System Link
B. Digital Subscriber Line
C. Dynamic Service Line
D. Digital System Link
Rationale: DSL provides broadband Internet access over standard
telephone lines.
12. Which layer of the OSI model is responsible for routing?
A. Data Link
B. Transport
C. Network
D. Physical
Rationale: The Network layer handles addressing and routing data
between networks.
