Impossible travel (A)refers to logins fromgeographically distant locations within a time period that makes travel between them physically impossible. In this case, a user logging in fromChicago and Rome within a short timeframetriggers this anomaly. This is a strong indicator of acompromised accountorstolen credentialsbeing used elsewhere. Reference: CompTIA Security+ SY0-701 Objectives, Domain 2.1 - "Indicators of malicious activity: Impossible travel (geolocation anomalies)."