Transit gateways are the method used by Wilson to achieve cloud network security in this scenario. Cloud network security is a branch of cybersecurity that focuses on protecting and securing the network infrastructure and traffic in a cloud environment. Cloud network security can involve various methods or techniques, such as encryption, firewall, VPN, IDS/IPS, etc. Transit gateways are a method of cloud network security that provide a network routing solution that establishes and manages communication between on-premises consumer networks and VPCs (Virtual Private Clouds) via a centralized unit.Transit gateways can be used to simplify and secure the connectivity between different networks or VPCs in a cloud environment.In the scenario, Wilson was instructed to enhance its cloud network security. To achieve this, Wilson deployed a network routing solution that established and managed communication between the on-premises consumer network and VPCs via a centralized unit. This means that he used transit gateways for this purpose. A virtual private cloud (VPC) is not a method of cloud network security, but a term that describes an isolated and private section of a public cloud that provides exclusive access to cloud resources to a single organization or entity.A VPC can be used to create and configure virtual networks in a cloud environment.Public and private subnets are not methods of cloud network security, but terms that describe segments of a VPC that have different levels of accessibility or visibility.A public subnet is a segment of a VPC that can be accessed from the internet or other networks.A private subnet is a segment of a VPC that cannot be accessed from the internet or other networks.A VPC endpoint is not a method of cloud network security, but a term that describes an interface that allows private connectivity between a VPC and other AWS (Amazon Web Services) services or resources.