2026/2027 IT Certification Practice Exam:
100 Questions on PoE, MDM, SDN, TPM,
HSM, Hypervisors, Private IPs, &
Troubleshooting — with Answer
Explanations
Description:
Master networking, mobile device management, virtualization, and hardware security with
this comprehensive 100-question practice exam for 2026/2027. Covers PoE standards
(802.3af/at/bt), SDN architecture, TPM vs. HSM, Type 1 & 2 hypervisors, containerization,
private IPv4 ranges, APIPA, SCADA, and more. Each question includes a correct answer and
detailed explanation.
Download now to pass your IT certification on the first attempt.
, CompTIA Network+ & Security+ Practice Exam 2026
Section A: Power and Connectivity Technologies
Question 1
A technician needs to provide both data connectivity and power to a wireless access point
located in a ceiling where no electrical outlet is available. Which of the following devices would
be most appropriate to insert between the network switch and the access point?
A. PoE injector
B. Port replicator
C. Redundant power supply
D. Hardware security module
Answer: A
Explanation: A Power over Ethernet (PoE) injector adds DC power to an Ethernet cable,
enabling a single cable to carry both data and power to devices such as access points, VoIP
phones, or cameras.
Question 2
A network administrator is deploying a new IP surveillance camera that requires approximately
28 watts of power over Ethernet. Which PoE standard must the switch support to reliably power
this device?
A. IEEE 802.3af (PoE)
B. IEEE 802.3at (PoE+)
C. IEEE 802.3bt Type 3 (PoE++)
D. IEEE 802.3bt Type 4 (PoE++)
Answer: B
Explanation: PoE+ (IEEE 802.3at) provides up to 25.5 watts of DC power to connected devices,
sufficient for a 28-watt requirement after accounting for cable losses. Original PoE (802.3af)
supplies only 15.4 watts.
,Question 3
Which of the following accurately describes a key characteristic of the PoE++ standard (IEEE
802.3bt Type 4)?
A. Maximum current of 350 mA
B. Support for up to 71.3 watts DC power
C. Maximum data rate of 1 Gbps only
D. Requires special non-standard cabling
Answer: B
Explanation: PoE++ Type 4 (IEEE 802.3bt) delivers up to 71.3 watts at a maximum current of
960 mA and supports 10GBASE-T networking, making it suitable for high-power devices like
digital signage and thin clients.
Question 4
An inverter in a display system is primarily responsible for:
A. Converting AC power to DC power
B. Supplying power to the screen’s backlight
C. Managing cryptographic keys for secure display
D. Providing network connectivity to the display
Answer: B
Explanation: An inverter converts DC power to AC power specifically to drive the backlight in
older LCD screens. While it performs DC-to-AC conversion, its core functional purpose in this
context is backlight power.
, Section B: Mobile Devices, Management, and Roaming
Question 5
A company allows employees to use their personal smartphones for work email and applications,
while keeping personal data separate. The IT team centrally enforces policies, configures
corporate email, and can wipe only the work partition if the device is lost. This describes:
A. Preferred Roaming List (PRL) management
B. Mobile Device Management (MDM) with containerization
C. Port replicator configuration
D. Hypervisor Type 1 deployment
Answer: B
Explanation: MDM solutions support corporate-owned and BYOD devices, allowing
administrators to control either the entire device or a secure container/partition. No user
configuration is needed for enrollment once policies are applied.
Question 6
Which component enables a mobile phone to connect to the correct cellular tower, especially
when roaming outside its home network, and can be updated over the air?
A. PRL (Preferred Roaming List)
B. SIM card
C. TPM (Trusted Platform Module)
D. SDN controller
Answer: A
Explanation: The Preferred Roaming List (PRL) allows a phone to identify and connect to the
appropriate tower frequencies and networks. Carriers can push OTA updates to refresh this list.
100 Questions on PoE, MDM, SDN, TPM,
HSM, Hypervisors, Private IPs, &
Troubleshooting — with Answer
Explanations
Description:
Master networking, mobile device management, virtualization, and hardware security with
this comprehensive 100-question practice exam for 2026/2027. Covers PoE standards
(802.3af/at/bt), SDN architecture, TPM vs. HSM, Type 1 & 2 hypervisors, containerization,
private IPv4 ranges, APIPA, SCADA, and more. Each question includes a correct answer and
detailed explanation.
Download now to pass your IT certification on the first attempt.
, CompTIA Network+ & Security+ Practice Exam 2026
Section A: Power and Connectivity Technologies
Question 1
A technician needs to provide both data connectivity and power to a wireless access point
located in a ceiling where no electrical outlet is available. Which of the following devices would
be most appropriate to insert between the network switch and the access point?
A. PoE injector
B. Port replicator
C. Redundant power supply
D. Hardware security module
Answer: A
Explanation: A Power over Ethernet (PoE) injector adds DC power to an Ethernet cable,
enabling a single cable to carry both data and power to devices such as access points, VoIP
phones, or cameras.
Question 2
A network administrator is deploying a new IP surveillance camera that requires approximately
28 watts of power over Ethernet. Which PoE standard must the switch support to reliably power
this device?
A. IEEE 802.3af (PoE)
B. IEEE 802.3at (PoE+)
C. IEEE 802.3bt Type 3 (PoE++)
D. IEEE 802.3bt Type 4 (PoE++)
Answer: B
Explanation: PoE+ (IEEE 802.3at) provides up to 25.5 watts of DC power to connected devices,
sufficient for a 28-watt requirement after accounting for cable losses. Original PoE (802.3af)
supplies only 15.4 watts.
,Question 3
Which of the following accurately describes a key characteristic of the PoE++ standard (IEEE
802.3bt Type 4)?
A. Maximum current of 350 mA
B. Support for up to 71.3 watts DC power
C. Maximum data rate of 1 Gbps only
D. Requires special non-standard cabling
Answer: B
Explanation: PoE++ Type 4 (IEEE 802.3bt) delivers up to 71.3 watts at a maximum current of
960 mA and supports 10GBASE-T networking, making it suitable for high-power devices like
digital signage and thin clients.
Question 4
An inverter in a display system is primarily responsible for:
A. Converting AC power to DC power
B. Supplying power to the screen’s backlight
C. Managing cryptographic keys for secure display
D. Providing network connectivity to the display
Answer: B
Explanation: An inverter converts DC power to AC power specifically to drive the backlight in
older LCD screens. While it performs DC-to-AC conversion, its core functional purpose in this
context is backlight power.
, Section B: Mobile Devices, Management, and Roaming
Question 5
A company allows employees to use their personal smartphones for work email and applications,
while keeping personal data separate. The IT team centrally enforces policies, configures
corporate email, and can wipe only the work partition if the device is lost. This describes:
A. Preferred Roaming List (PRL) management
B. Mobile Device Management (MDM) with containerization
C. Port replicator configuration
D. Hypervisor Type 1 deployment
Answer: B
Explanation: MDM solutions support corporate-owned and BYOD devices, allowing
administrators to control either the entire device or a secure container/partition. No user
configuration is needed for enrollment once policies are applied.
Question 6
Which component enables a mobile phone to connect to the correct cellular tower, especially
when roaming outside its home network, and can be updated over the air?
A. PRL (Preferred Roaming List)
B. SIM card
C. TPM (Trusted Platform Module)
D. SDN controller
Answer: A
Explanation: The Preferred Roaming List (PRL) allows a phone to identify and connect to the
appropriate tower frequencies and networks. Carriers can push OTA updates to refresh this list.
