Which of the following will allow an organization to add additional servers without expanding the physical footprint within the corporate datacenter?

Web applications are software accessed over a network, and while they can be hosted on servers, they don't inherently allow adding more servers without expanding physical infrastructure.

A hypervisor is a software layer that creates and manages virtual machines (VMs), allowing multiple isolated operating systems and applications to run on a single piece of physical hardware. This virtualization dramatically increases the number of 'servers' (VMs) an organization can host on existing physical infrastructure, without expanding the physical footprint of the datacenter.

A load balancer distributes network traffic across multiple servers, which improves performance and availability but doesn't increase server density or reduce physical footprint.

Dynamic routing refers to routing protocols that automatically adjust to network changes, facilitating efficient data transfer but not contributing to increasing the number of servers on a physical footprint.