WGU D413 Objective Assessment (Latest 2026/2027
Update) Telecommunications and Wireless
Communications Guide
Question 1: Which layer of the OSI model is responsible for routing packets between networks?
A) Physical Layer
B) Data Link Layer
C) Network Layer
D) Transport Layer
Correct Answer: C) Network Layer
Explanation: The Network Layer (Layer 3) is responsible for routing packets between different
networks, determining the best path for data transmission, and handling logical addressing (IP
addresses).
Question 2: What is the maximum data transfer rate for Bluetooth 5.0?
A) 1 Mbps
B) 2 Mbps
C) 24 Mbps
D) 50 Mbps
Correct Answer: C) 24 Mbps
Explanation: Bluetooth 5.0 offers a maximum data transfer rate of 24 Mbps, which is double the
speed of Bluetooth 4.2, while maintaining low power consumption.
Question 3: Which multiple access technique divides the frequency spectrum into smaller
sub-bands?
A) TDMA
B) FDMA
C) CDMA
, D) SDMA
Correct Answer: B) FDMA
Explanation: Frequency Division Multiple Access (FDMA) divides the available frequency spectrum
into smaller sub-bands, with each user assigned a specific frequency channel for communication.
Question 4: What is the primary function of a base station in cellular networks?
A) Data encryption
B) Signal amplification
C) Connection between mobile users and the network
D) Power management
Correct Answer: C) Connection between mobile users and the network
Explanation: Base stations serve as the interface between mobile devices and the cellular network,
handling radio communication, call setup, and handoff procedures.
Question 5: Which wireless standard operates in the 2.4 GHz and 5 GHz bands?
A) ZigBee
B) Wi-Fi 6
C) LoRa
D) NFC
Correct Answer: B) Wi-Fi 6
Explanation: Wi-Fi 6 (802.11ax) operates in both 2.4 GHz and 5 GHz frequency bands, providing
higher data rates and improved efficiency compared to previous Wi-Fi standards.
Question 6: What is the typical range of NFC (Near Field Communication)?
A) 10 meters
B) 100 meters
C) 4 cm
D) 1 km
Correct Answer: C) 4 cm
Update) Telecommunications and Wireless
Communications Guide
Question 1: Which layer of the OSI model is responsible for routing packets between networks?
A) Physical Layer
B) Data Link Layer
C) Network Layer
D) Transport Layer
Correct Answer: C) Network Layer
Explanation: The Network Layer (Layer 3) is responsible for routing packets between different
networks, determining the best path for data transmission, and handling logical addressing (IP
addresses).
Question 2: What is the maximum data transfer rate for Bluetooth 5.0?
A) 1 Mbps
B) 2 Mbps
C) 24 Mbps
D) 50 Mbps
Correct Answer: C) 24 Mbps
Explanation: Bluetooth 5.0 offers a maximum data transfer rate of 24 Mbps, which is double the
speed of Bluetooth 4.2, while maintaining low power consumption.
Question 3: Which multiple access technique divides the frequency spectrum into smaller
sub-bands?
A) TDMA
B) FDMA
C) CDMA
, D) SDMA
Correct Answer: B) FDMA
Explanation: Frequency Division Multiple Access (FDMA) divides the available frequency spectrum
into smaller sub-bands, with each user assigned a specific frequency channel for communication.
Question 4: What is the primary function of a base station in cellular networks?
A) Data encryption
B) Signal amplification
C) Connection between mobile users and the network
D) Power management
Correct Answer: C) Connection between mobile users and the network
Explanation: Base stations serve as the interface between mobile devices and the cellular network,
handling radio communication, call setup, and handoff procedures.
Question 5: Which wireless standard operates in the 2.4 GHz and 5 GHz bands?
A) ZigBee
B) Wi-Fi 6
C) LoRa
D) NFC
Correct Answer: B) Wi-Fi 6
Explanation: Wi-Fi 6 (802.11ax) operates in both 2.4 GHz and 5 GHz frequency bands, providing
higher data rates and improved efficiency compared to previous Wi-Fi standards.
Question 6: What is the typical range of NFC (Near Field Communication)?
A) 10 meters
B) 100 meters
C) 4 cm
D) 1 km
Correct Answer: C) 4 cm
