Rotating Mode (Rotating)
Default mode. Each HTTP request will get a new IP.
Sticky Mode (Sticky)
Achieve this by adding the session parameter after the user name. For example: user-country-us-session-abc123.
As long as the session ID remains unchanged and the IP is within the validity period (usually 10-30 minutes), the system will try to keep the IP unchanged. When the IP becomes invalid, the system will automatically assign a new IP (at this time the physical IP corresponding to the Session ID will change).