The Cisco Local Director series offers a high-availability, integrated hardware and software solution that intelligently balances the load of user traffic across multiple Transmission Control Protocol/Internet Protocol (TCP/IP) application servers. Cisco Local Director tracks network sessions and server load conditions in real time, directing each session to the most appropriate server. All physical servers appear as one virtual server, requiring only a single IP address and a single Universal Resource Locator (URL) for an entire server farm.