Traffic management: ULB distributes incoming network traffic across multiple servers to ensure no single server is overwhelmed. This balanced traffic distribution prevents bottlenecks and enhances the overall performance and reliability of the network. This applies to Layer 4 (L4) protocols, such as UDP and TCP.

High Availability: By distributing traffic among multiple servers, ULB ensures that the failure or unavailability of a single server does not impact the entire system. This redundancy is critical for maintaining continuous service availability to users.

Scalability: ULB supports horizontal scaling, allowing the addition of more servers to handle increased traffic loads without disrupting existing services. This scalability is vital for accommodating growth and sudden spikes in traffic.

Security: ULB can provide an additional layer of security by masking the internal server IP addresses and managing secure connections. This helps protect the backend infrastructure from direct exposure to potential threats.

Performance optimization: By facilitating Direct Server Response (DSR), ULB reduces latency and the load on the load balancer node, thereby optimizing the performance of network communications.