Designing a global network infrastructure requires careful planning and consideration of various factors. Here are some key steps to take: 1. Define the network requirements: This includes identifying the types of devices that will be connected to the network, the expected traffic volume, and the need for redundancy and failover. 2. Develop a network topology: Once the requirements are defined, the next step is to design the network topology that will meet those requirements. This includes deciding on the types of devices, the network architecture, and how they will be connected. 3. Choose the right network components: Once the topology is defined, the next step is to select the right network components, such as routers, switches, and firewalls. This involves understanding the specific needs of the network and selecting components that are scalable, reliable, and secure. 4. Address security concerns: Security should be a top priority when designing a global network infrastructure. This includes implementing firewalls, intrusion detection and prevention systems, and other security measures that will protect the network from unauthorized access and data breaches. 5. Plan for scalability: A global network infrastructure must be able to scale as the business grows. This includes designing the network with enough bandwidth to handle future growth and implementing technologies like load balancing and virtualization to ensure optimal performance. 6. Test and optimize the network: Once the network is designed and implemented, it's important to test and optimize it to ensure that it meets the requirements and performs as expected. This involves running various tests and simulations to identify any potential issues and making adjustments as needed. By following these steps, a product manager can design a global network infrastructure that is scalable, reliable, and secure, and that meets the needs of the business and its users.