ATT TEST 3 - TELECOMMUNICATIONS
AND NETWORKING QUESTIONS AND
ANSWERS
1. What is the standard core diameter of a single-mode fiber optic cable?
A. 9 microns
B. 62.5 microns
C. 50 microns
D. 100 microns
Answer: A
Conceptual Explanation: Single-mode fiber typically has a small core diameter of
approximately 8 to 10 microns, with 9 microns being the industry standard.
2. Which protocol is primarily used to automatically assign IP addresses to devices on a
network?
A. DNS
B. SMTP
C. HTTP
D. DHCP
,Answer: D
Conceptual Explanation: Dynamic Host Configuration Protocol (DHCP) is used to
automatically assign IP addresses and other network configuration parameters to devices.
3. In telecommunications, what does the acronym ‘POTS’ stand for?
A. Primary Optical Transport System
B. Plain Old Telephone Service
C. Public Online Telephony Server
D. Personal Optical Terminal Station
Answer: B
Conceptual Explanation: POTS stands for Plain Old Telephone Service, referring to the
traditional analog voice grade telephone service.
4. What is the maximum distance for a standard Category 6 (Cat6) Ethernet cable to support
10 Gbps speeds?
A. 100 meters
B. 55 meters
C. 300 meters
D. 10 meters
Answer: B
, Conceptual Explanation: While Cat6 can run 1 Gbps up to 100 meters, it is limited to
approximately 37-55 meters when supporting 10 Gbps speeds.
5. Which layer of the OSI model is responsible for routing data packets between different
networks?
A. Data Link Layer
B. Physical Layer
C. Transport Layer
D. Network Layer
Answer: D
Conceptual Explanation: The Network Layer (Layer 3) handles logical addressing and
routing of packets across networks.
6. What is the purpose of an ONT in a Fiber-to-the-Premises (FTTP) installation?
A. To amplify wireless signals
B. To store customer data logs
C. To convert optical signals into electrical signals
D. To regulate the power voltage of the house
Answer: C
Conceptual Explanation: The Optical Network Terminal (ONT) converts the light signals
from the fiber optic cable into electrical signals that the router can understand.
AND NETWORKING QUESTIONS AND
ANSWERS
1. What is the standard core diameter of a single-mode fiber optic cable?
A. 9 microns
B. 62.5 microns
C. 50 microns
D. 100 microns
Answer: A
Conceptual Explanation: Single-mode fiber typically has a small core diameter of
approximately 8 to 10 microns, with 9 microns being the industry standard.
2. Which protocol is primarily used to automatically assign IP addresses to devices on a
network?
A. DNS
B. SMTP
C. HTTP
D. DHCP
,Answer: D
Conceptual Explanation: Dynamic Host Configuration Protocol (DHCP) is used to
automatically assign IP addresses and other network configuration parameters to devices.
3. In telecommunications, what does the acronym ‘POTS’ stand for?
A. Primary Optical Transport System
B. Plain Old Telephone Service
C. Public Online Telephony Server
D. Personal Optical Terminal Station
Answer: B
Conceptual Explanation: POTS stands for Plain Old Telephone Service, referring to the
traditional analog voice grade telephone service.
4. What is the maximum distance for a standard Category 6 (Cat6) Ethernet cable to support
10 Gbps speeds?
A. 100 meters
B. 55 meters
C. 300 meters
D. 10 meters
Answer: B
, Conceptual Explanation: While Cat6 can run 1 Gbps up to 100 meters, it is limited to
approximately 37-55 meters when supporting 10 Gbps speeds.
5. Which layer of the OSI model is responsible for routing data packets between different
networks?
A. Data Link Layer
B. Physical Layer
C. Transport Layer
D. Network Layer
Answer: D
Conceptual Explanation: The Network Layer (Layer 3) handles logical addressing and
routing of packets across networks.
6. What is the purpose of an ONT in a Fiber-to-the-Premises (FTTP) installation?
A. To amplify wireless signals
B. To store customer data logs
C. To convert optical signals into electrical signals
D. To regulate the power voltage of the house
Answer: C
Conceptual Explanation: The Optical Network Terminal (ONT) converts the light signals
from the fiber optic cable into electrical signals that the router can understand.
