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?
Amplified DDoS attack leveraging multiple endpoints
Credential spraying across the network
Account lockouts due to repeated failed login attempts
Privilege escalation due to system misconfigurations
Concurrent sessions from multiple locations
Time-of-check (TOC) vs. Time-of-use (TOU) race conditions