The load balancer uses a hash-based distribution algorithm. By default, it uses a 5-tuple hash to map traffic to available services and servers. It provides stickiness only within a transport session. Packets in the same TCP or UDP session will be directed to the same instance behind the load balancer. When the sender site closes, and reopens the session or starts a new session from the same source IP, the source port changes. This may result in a redirection of the traffic to a different data center and load balancer endpoint.