Final answer:
A Load Balancer is the device that evenly distributes network traffic among multiple servers, ensuring high availability and resiliency by preventing any single server from being overwhelmed.
Step-by-step explanation:
The device that distributes traffic evenly among each system in a pool and is designed to help achieve both high availability and resiliency is known as a Load Balancer. By distributing incoming network traffic across a group of backend servers, also known as a server farm or server pool, a Load Balancer ensures that no single server bears too much demand. This helps to increase the availability and reliability of applications, websites, or services by balancing the load, which can improve overall performance and prevent any single server from becoming a single point of failure.