Log monitoring tools performing behavioral analysis have alerted several suspicious logins on a Linux server occurring during non-business hours. After further examination of all login activities…

'Time Keeper' is not a recognized standard network protocol for time synchronization on Linux servers.

The Network Time Protocol (NTP) is the industry standard protocol used on Linux servers and most network devices to automatically synchronize their system clocks with a reliable time source. A significant time discrepancy suggests that the NTP service or its configuration has ceased to function correctly.

PPP (Point-to-Point Protocol) is a data link layer protocol used for establishing direct connections between two network nodes, typically for dial-up or dedicated lines, and is not involved in time synchronization.

OSPP is not a recognized network protocol; OSPF (Open Shortest Path First) is a routing protocol used to find the best paths for data packet delivery, unrelated to time synchronization.