Seattle-based F5 Networks, a developer of load balancing and other network hardware, reported today that it has been selected by software-as-a-service provider RelayHealth. F5 said that RelayHealth has selected the firm's BIG-IP Local Traffic Manager and Global Traffic Manager products, to optimize performance and availability of its web-based, retail pharmacy applications. Financial impact of the win was not disclosed. F5 said its BIG-IP devices are being used to route Internet traffic to data centers in Atlanta and Sacramento, across hundreds of physical and virtual servers.