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Axis ANVE Exam - Topic 4 Question 126 Discussion

Actual exam question for Axis's ANVE exam

Question #: 126
Topic #: 4

[All ANVE Questions]

In many places 24 V AC has been popular as a power source but now 12 V and 24 V DC is increasing in popularity because

AThere is more energy in DC.

BIt is easier to back-up DC with battery.

CThere is less power loss in cables with DC.

DThere is less risk for surge with DC.

Show Suggested Answer

Suggested Answer: B

12 V and 24 V DC power sources are becoming increasingly popular compared to 24 V AC because it is easier to back-up DC with batteries. DC power systems can be directly connected to battery backup systems without the need for conversion, making the implementation simpler and more reliable during power outages. This efficiency in backup capability is one of the primary reasons for the shift from AC to DC in many applications, including surveillance systems. [Reference: Axis Communications - Power over Ethernet for Network Cameras]

by Kati at May 13, 2026, 11:58 AM

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Alishia

12 hours ago

I feel like we had a practice question about power loss in cables, and I think DC does have advantages there, but I can't recall the specifics.

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Sheldon

6 days ago

I think we discussed how battery backup systems are easier with DC, so option B might be the right choice here.

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Delfina

2 months ago

I remember studying that DC is often more efficient for low-voltage applications, but I'm not sure if that's the main reason for its popularity.

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