What security concern arises when the system logs reveal that a user has established multiple active sessions from geographically disparate locations within a timeframe that precludes the possibility of physical travel between these points?
Concurrent sessions from multiple locations
Credential spraying across the network
Amplified DDoS attack leveraging multiple endpoints
Time-of-check (TOC) vs. Time-of-use (TOU) race conditions
Privilege escalation due to system misconfigurations
Account lockouts due to repeated failed login attempts