Software-Defined Networking (SDN)
Definition - What does Software-Defined Networking (SDN) mean?
Techopedia explains Software-Defined Networking (SDN)
SDN however, decouples the control from the networking hardware’s firmware and puts it in the hands of the network administrator. He or she can "shape" network traffic from a central control console without changing the settings of individual switches. This means the administrator can change network rules, prioritization as necessary and even block certain packets with great control. SDN is therefore very important for cloud computing (which has a multi-tenant architecture) because it allows for a more efficient and flexible control of traffic loads.
SDN is a cheaper alternative to previous types of networking because it allows for the use of cheaper commodity switches yet provides better control of traffic than before. Network engineers and administrators can support switching fabrics across hardware from different vendors and models as well as integrate switches with ASICs and those without. OpenFLow is currently the most popular specification for SDN and allows remote control of routing tables.
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