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Which biometric technique authenticates people by analyzing the layer of blood vessels at the back of their eyes?
Correct Answer: C
The biometric technique that authenticates individuals by analyzing the layer of blood vessels at the back of their eyes is Retina Scanning. This method uses the unique patterns of the retinal blood vessels for identification, which are stable and distinctive to each person. Retina scanning involves shining a low-intensity light source through an optical coupler to scan the retina's unique patterns123. References: The information aligns with the Certified Network Defender (CND) course's focus on understanding various biometric techniques and their application in network security. Retina scanning is highlighted for its precision and uniqueness, making it suitable for high-security requirements123.