Answer: Multi-Factor Authentication (MFA)

The question asks which Snowflake feature provides increased login security powered by Duo Security service. Multi-Factor Authentication (MFA) is the correct answer because Snowflake's MFA implementation is specifically integrated with Duo Security as a managed service. The community discussion confirms this with 100% consensus on answer D, and multiple comments reference Snowflake documentation stating that MFA support is provided as an integrated feature powered by Duo Security. OAuth (A) is an authorization framework but not specifically powered by Duo for Snowflake login security. Network policies (B) control network access but don't involve Duo Security. Single Sign-On (C) provides centralized authentication but is not the feature specifically powered by Duo Security in Snowflake.

Author: LeetQuiz Editorial Team