Which of the following is NOT a type of load balancing in SonicOS?

Dynamic Distribution is not recognized as a specific type of load balancing in SonicOS. Instead, SonicWall offers various well-defined load balancing methods, including Round Robin, Spillover, and Basic Failover.

Round Robin is a common method where traffic is distributed evenly among available servers in a sequential manner, ensuring that each server receives a fair share of the requests over time. Spillover is utilized typically to handle situations where one server is overwhelmed; it sends any additional traffic to a secondary server, effectively balancing the load and enhancing performance under high demand scenarios. Basic Failover, on the other hand, focuses on resilience rather than load distribution; it allows traffic to shift from a failing server to a functioning one, ensuring continuity of service.

Dynamic Distribution sounds plausible but it does not correspond to any specific implementation or term used in SonicOS's documented load balancing methods. This distinction makes it the correct answer for identifying which option does not belong in the context of SonicWall’s load balancing terminology.