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The ESNT exam has 80 questions and runs 2 hours.
These 10 free ESNT questions are organized by exam domain, so you can see how each part of the Electronic Security Networking Technician blueprint is tested. Reveal the answer and explanation under each question.
For a wireless gate camera, the acceptance plan requires received signal strength of at least −67 dBm and signal-to-noise ratio (SNR) of at least 25 dB. Measurements at the mounting point are −60 dBm and 14 dB SNR. Which entry belongs in the acceptance record?
Correct answer: C - Signal strength passes; SNR fails.
A recorder is configured as 172.22.40.10 with mask 255.255.254.0 (/23). A camera on the same VLAN needs an unused host address in that subnet. All four proposed addresses are unassigned. Which one is valid for the camera?
Correct answer: D - 172.22.40.255
A camera at 172.30.8.24/24 sends video to a recorder at 172.30.9.40/24 through router interface 172.30.8.1. Its ARP entry for that interface is valid, and no address translation occurs. In an Ethernet frame leaving the camera, identify the destination MAC address and the enclosed packet's destination IP address.
Correct answer: A - Router MAC; recorder IP.
Every pin on a newly terminated camera cable connects to the same numbered pin at the far end, so a DC continuity tester reports a pass. Crosstalk testing fails. Inspection reveals that pins 1 and 2 use conductors from different twisted pairs at both ends. What fault has the continuity check missed?
Correct answer: A - A split pair.
At a fiber patch panel, a technician sees no light from a disconnected connector and notes that the switch port indicates link down. The far-end optical source has not been identified. Before using an eyepiece inspection microscope, which precaution controls the optical exposure hazard?
Correct answer: C - Isolate optical sources; verify inactivity with a suitable optical tester.
Following a switch replacement, cameras in VLAN 40 remain viewable from a laptop on their access switch, but the NVR on a second switch cannot reach them. All endpoints have valid addresses in one subnet and access ports in VLAN 40. VLAN 40 is active on both switches, and the trunk link is up. The camera switch's trunk permits VLANs 10, 20 and 40; the NVR switch's trunk permits only 10 and 20. To restore communication on the existing camera VLAN, the technician should:
Correct answer: B - Add VLAN 40 to the NVR switch's permitted trunk VLANs.
A recorder's RAID 10 array has three two-drive mirror pairs: 1/2, 3/4 and 5/6. Drives 1 and 3 have failed; all surviving drives remain readable, and no rebuild has occurred. Considering drive failures alone, which further single-drive failure would leave the array accessible?
Correct answer: B - Failure of either drive 5 or drive 6.
SNMPv3 monitoring is configured with authNoPriv. Message authentication succeeds, yet a packet capture exposes the managed-object values. The manager and switches support all three SNMPv3 security levels. Site policy requires authenticated, confidential monitoring traffic. What configuration change satisfies that policy?
Correct answer: A - Use authPriv with matching authentication and privacy settings.
A camera must continue supplying H.265 video to its NVR. An added viewing workstation decodes only H.264. The camera supports simultaneous streams in both codecs; the VMS can relay them but cannot transcode them. How should the recording and viewing paths be configured?
Correct answer: D - Keep H.265 recording and supply a separate H.264 viewing stream.
Live video already works between a camera and a third-party application. The next requirement is a standardized interface for analytics metadata, including object classifications and associated events. Which ONVIF profile is specifically dedicated to this function?
Correct answer: C - Profile M
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