312-49 · Question #619
312-49 Question #619: Real Exam Question with Answer & Explanation
The correct answer is B: Electronic Serial Number (ESN). The Electronic Serial Number (ESN) is a unique identifier historically used in CDMA devices that encodes manufacturer information within its structure — the first 8 bits represent the manufacturer code assigned by the TIA. The EIR (Equipment Identity Register) is a network-side
Question
An investigator has found certain details after analysis of a mobile device. What can reveal the manufacturer information?
Options
- AEquipment Identity Register (EIR)
- BElectronic Serial Number (ESN)
- CInternational mobile subscriber identity (IMSI)
- DIntegrated circuit card identifier (ICCID)
Explanation
The Electronic Serial Number (ESN) is a unique identifier historically used in CDMA devices that encodes manufacturer information within its structure — the first 8 bits represent the manufacturer code assigned by the TIA. The EIR (Equipment Identity Register) is a network-side database, not a device identifier. The IMSI identifies the subscriber on the network, and the ICCID identifies the SIM card itself — neither inherently encodes the device manufacturer.
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