Software Defined Wide Area Network is best described as the modern aged, secure connection to the rest of the world with flexible manageability. It is the new and improved connection to the internet. You are no longer limited to having a piece of hardware for each and every different function you may require for security, manageability, and ease of use on a network and instead can replace these hardware pieces with a very easy to use "Software" on one device. It will support multiple connection types such as your ISP's connection at home bringing you access to the web combined with another type such as the LTE connection in your mobile phone. This allows fail-over or load balancing in case one happens to go down, the network will still be able to remain up with no interruption to users. The ability to to select the most optimal paths for the data to be routed is in place so there will be virtually no lag time. A modern, yet simple User Interface is in place to control all devices on the network is provided. Think Apple's simplistic UI for the iPhone; it's easy to pick up and get around without a long list of instructions (even your grandma can control with little to no assistance!) It has the ability to act as a firewall, VPN, etc. (These help keep the bad guys out while securely letting the good guys in. You can connect up to your work or school computer from virtually anywhere using secured VPN. In a nutshell, SD-WAN promotes quick setup, increased systems performance, and lowers the overall cost of network upkeep.
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