Which of the following statements is a requirement for session maintenance during failover in HA?

For session maintenance during failover in a High Availability (HA) setup, enabling session pick-up functionality is crucial. This feature allows sessions that were established before the failover to be resumed after the failover occurs. When session pick-up is enabled, the new active unit can retrieve the session information from the passive unit. This ensures continuity of service and that sessions are not abruptly terminated, enhancing user experience and maintaining network stability.

While other statements present concepts related to network sessions, they do not accurately address the requirements for maintaining sessions specifically during HA failover scenarios. For example, maintaining connections within the same subnet may be beneficial for network performance, but it does not directly relate to session continuity during a failover. Similarly, while some sessions indeed rely on UDP, session pick-up functionality is not limited to any specific protocol type and applies universally to sessions regardless of the underlying transport protocol. Lastly, the statement regarding only TCP connections being supported is incorrect, as HA principles apply across multiple protocols, making session pick-up the necessary mechanism for effective session management during failover events.