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A Software-Defined Wide Area Network (SD-WAN) is a wide area network that uses software-defined networking technology, such as communicating over the Internet using overlay tunnels which are encrypted when destined for internal organization locations.
An SD-WAN is a WAN managed using the principles of software-defined networking. [51] The main driver of SD-WAN is to lower WAN costs using more affordable and commercially available leased lines, as an alternative or partial replacement of more expensive MPLS lines. Control and management is administered separately from the hardware with ...
SD-WAN vendors may offer some security functions with their SD-WAN virtual or physical appliances, which are typically deployed at the data center or branch office. Typically SASE incorporates SD-WAN as part of a cloud service that also delivers mobile access and a full security stack delivered from a local PoP.
The textbook definition of a WAN is a computer network spanning regions, countries, or even the world. [3] [4] However, in terms of the application of communication protocols and concepts, it may be best to view WANs as computer networking technologies used to transmit data over long distances, and between different networks.
An overlay network is a computer network that is layered on top of another (logical as opposed to physical) network. The concept of overlay networking is distinct from the traditional model of OSI layered networks, and almost always assumes that the underlay network is an IP network of some kind.
WAN optimization has been the subject of extensive academic research almost since the advent of the WAN. [5] In the early 2000s, research in both the private and public sectors turned to improving the end-to-end throughput of TCP, [6] and the target of the first proprietary WAN optimization solutions was the Branch WAN. In recent years, however ...
NetScaler is a line of networking products owned by Cloud Software Group. The products consist of NetScaler, an application delivery controller (ADC), NetScaler AppFirewall, an application firewall, NetScaler Unified Gateway, NetScaler Application Delivery Management (ADM), and NetScaler SD-WAN, which provides software-defined wide-area networking management.
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