A hardware load-balancing device (HLD), also known as a layer 4-7 router, is a physical unit that directs computers to individual servers in a network, based on factors such as server processor utilization, the number of connections to a server, or the overall server performance.
Load balancing is a technique used to distribute workloads uniformly across servers or other compute resources to optimize network efficiency, reliability and capacity.
Software-defined WAN (SD-WAN) is technology that uses software-defined networking (SDN) concepts to distribute network traffic across a wide area network (WAN).
On a wide area network (WAN), transparent addressing is a method of network addressing in which all intermediate node addresses are spoofed, so the client and server see each other's addresses and port configurations as if there were no intermediate nodes.
WAN optimization -- also known as WAN acceleration -- is the category of technologies and techniques used to maximize the efficiency of data's flow across a wide area network (WAN), between organizations' centralized data centers and their remote locations.