benefits of SDN to networking

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Multiprotocol Label Switching - also known as MPLS - was around before software-defined wide area networking

There are pros and cons to SDN, too, and we've collated a few of them for you below:
  • Visibility. Separating the data plane and control plane gives the IT department an aerial-like view of the entire network.
  • Efficient. Able to make changes that can increase the speed of the entire network.
  • Secure. The higher visibility allows for much better security and stops security breaches.
There are also cons to consider!
  • Very little in the way of hardware security, as you are eliminating the use of physical routers and switches.

MPLS is a technique, not a service. It was started at the turn of the century, and it works to address determine efficient routes for packets that enter a network. Using MPLS, a packet will go into the network and be assigned to a specific FEC. It's a layer 2.5 service, and it's not as modern as SD-WAN

More info: wan and mpls meaning

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