NENA ENP EXAM FULLY SOLVED –
COMPLETE EXAM 320 Exam Questions
with Answers
SECTION 1: PRINCIPLES OF TELECOMMUNICATIONS (Questions 1-50)
1. What is the primary function of transport facilities in a
telecommunications network?
A. To switch calls between different carriers
B. To provide the physical medium over which transmission takes place
C. To bill customers for long-distance calls
D. To route calls to the correct PSAP
Answer: B
2. Which type of transmission medium was the original infrastructure of
the phone system?
A. Fiber optic cable
B. Coaxial cable
C. Copper wire
D. Microwave
Answer: C
3. What is the characteristic of twisted pair copper wire that reduces
interference?
A. The wires are shielded with aluminum foil
B. The wires are twisted around each other
C. The wires are encased in a metal conduit
D. The wires are separated by a dielectric material
Answer: B
4. Fiber optic cable transmits signals using which of the following?
A. Electrical pulses
B. Radio waves
,C. Light
D. Sound waves
Answer: C
5. Which of the following is NOT a characteristic of fiber optic cable?
A. Can transmit thousands of simultaneous voice signals
B. Can transmit analog signals directly
C. High bandwidth at low cost
D. Not sensitive to interference
Answer: B
6. Microwave transmission requires which of the following?
A. A direct buried cable
B. Line of sight between towers
C. Underwater cables
D. Satellite uplink
Answer: B
7. What is the approximate line-of-sight distance for microwave
transmission before a repeater is needed?
A. 10 miles
B. 30 miles
C. 50 miles
D. 100 miles
Answer: B
8. Satellite communications is a specialized form of which transmission
type?
A. Fiber optic
B. Copper wire
C. Microwave
D. Coaxial cable
Answer: C
9. At approximately what altitude do geosynchronous communications
satellites orbit?
A. 1,000 miles
,B. 10,000 miles
C. 22,300 miles
D. 50,000 miles
Answer: C
10. Coaxial cable is composed of which of the following?
A. Two twisted copper wires
B. A core conductor inside another conducting shield
C. Multiple fiber optic strands
D. A single copper wire with rubber insulation
Answer: B
11. What is the primary advantage of coaxial cable?
A. It is the cheapest transmission medium
B. It can transmit large amounts of data at high speed
C. It does not require any amplification
D. It works without any external power
Answer: B
12. A Local Exchange Carrier (LEC) provides telecommunications
services within what geographic area?
A. Nationwide
B. InterLATA
C. IntraLATA within a franchised area
D. International
Answer: C
13. What is a Competitive Local Exchange Carrier (CLEC)?
A. A carrier that provides only long-distance service
B. A carrier that competes with the incumbent LEC using existing
infrastructure
C. A carrier that provides only wireless service
D. A carrier that provides only international service
Answer: B
14. What is a Network Interface Device (NID)?
A. A device that converts analog to digital signals
, B. Equipment from the phone company that terminates its lines at the
customer premises
C. A switch that routes calls between carriers
D. A device that amplifies signals on fiber optic cables
Answer: B
15. The NID signifies which of the following?
A. The starting point of the local loop
B. The demarcation point between carrier and customer responsibility
C. The location of the central office
D. The point where calls are billed
Answer: B
16. A Central Office (CO) can refer to which of the following?
A. Only the building that houses switching equipment
B. Only the switching system that connects lines
C. Both the building and the switching system that connects lines
D. The customer's premises equipment
Answer: C
17. What does a Central Office deliver to connected customer
equipment?
A. Electrical power
B. Dial tone
C. Internet service
D. Television signals
Answer: B
18. Which of the following is a transport medium that uses radio
frequencies to transmit phone, video, and data?
A. Fiber optic
B. Coaxial cable
C. Microwave
D. Copper wire
Answer: C
COMPLETE EXAM 320 Exam Questions
with Answers
SECTION 1: PRINCIPLES OF TELECOMMUNICATIONS (Questions 1-50)
1. What is the primary function of transport facilities in a
telecommunications network?
A. To switch calls between different carriers
B. To provide the physical medium over which transmission takes place
C. To bill customers for long-distance calls
D. To route calls to the correct PSAP
Answer: B
2. Which type of transmission medium was the original infrastructure of
the phone system?
A. Fiber optic cable
B. Coaxial cable
C. Copper wire
D. Microwave
Answer: C
3. What is the characteristic of twisted pair copper wire that reduces
interference?
A. The wires are shielded with aluminum foil
B. The wires are twisted around each other
C. The wires are encased in a metal conduit
D. The wires are separated by a dielectric material
Answer: B
4. Fiber optic cable transmits signals using which of the following?
A. Electrical pulses
B. Radio waves
,C. Light
D. Sound waves
Answer: C
5. Which of the following is NOT a characteristic of fiber optic cable?
A. Can transmit thousands of simultaneous voice signals
B. Can transmit analog signals directly
C. High bandwidth at low cost
D. Not sensitive to interference
Answer: B
6. Microwave transmission requires which of the following?
A. A direct buried cable
B. Line of sight between towers
C. Underwater cables
D. Satellite uplink
Answer: B
7. What is the approximate line-of-sight distance for microwave
transmission before a repeater is needed?
A. 10 miles
B. 30 miles
C. 50 miles
D. 100 miles
Answer: B
8. Satellite communications is a specialized form of which transmission
type?
A. Fiber optic
B. Copper wire
C. Microwave
D. Coaxial cable
Answer: C
9. At approximately what altitude do geosynchronous communications
satellites orbit?
A. 1,000 miles
,B. 10,000 miles
C. 22,300 miles
D. 50,000 miles
Answer: C
10. Coaxial cable is composed of which of the following?
A. Two twisted copper wires
B. A core conductor inside another conducting shield
C. Multiple fiber optic strands
D. A single copper wire with rubber insulation
Answer: B
11. What is the primary advantage of coaxial cable?
A. It is the cheapest transmission medium
B. It can transmit large amounts of data at high speed
C. It does not require any amplification
D. It works without any external power
Answer: B
12. A Local Exchange Carrier (LEC) provides telecommunications
services within what geographic area?
A. Nationwide
B. InterLATA
C. IntraLATA within a franchised area
D. International
Answer: C
13. What is a Competitive Local Exchange Carrier (CLEC)?
A. A carrier that provides only long-distance service
B. A carrier that competes with the incumbent LEC using existing
infrastructure
C. A carrier that provides only wireless service
D. A carrier that provides only international service
Answer: B
14. What is a Network Interface Device (NID)?
A. A device that converts analog to digital signals
, B. Equipment from the phone company that terminates its lines at the
customer premises
C. A switch that routes calls between carriers
D. A device that amplifies signals on fiber optic cables
Answer: B
15. The NID signifies which of the following?
A. The starting point of the local loop
B. The demarcation point between carrier and customer responsibility
C. The location of the central office
D. The point where calls are billed
Answer: B
16. A Central Office (CO) can refer to which of the following?
A. Only the building that houses switching equipment
B. Only the switching system that connects lines
C. Both the building and the switching system that connects lines
D. The customer's premises equipment
Answer: C
17. What does a Central Office deliver to connected customer
equipment?
A. Electrical power
B. Dial tone
C. Internet service
D. Television signals
Answer: B
18. Which of the following is a transport medium that uses radio
frequencies to transmit phone, video, and data?
A. Fiber optic
B. Coaxial cable
C. Microwave
D. Copper wire
Answer: C
