Network Load Balancing (NLB) can be used to improve security in a variety of ways. For example, NLB can be used to distribute incoming traffic across multiple servers, which can help reduce the risk of a single point of failure. NLB can also be used to spread the load of incoming requests across multiple servers, which can help reduce the risk of a single server becoming overloaded and vulnerable to attack. Additionally, NLB can be used to provide redundancy and failover protection, ensuring that if one server goes down, the others can still handle the load. Finally, NLB can also be used to improve performance by distributing the load across multiple servers, allowing for faster response times.