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What’s software-defined networking (SDN)?

A graphical have a look at the know-how behind software-defined networking (SDN)

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  1. I think its a great video because it has managed to deliver useful information about SDN (its histroy and use cases) in a very short and nicely animated format.

    This video should be useful for technical and management people as well as business leaders.

  2. In recent years, software defined networking, or SDN, has emerged as the next big thing in the networking industry, given all the hype, where are we now?

    Researchers at Stanford are credited with creating the idea of bringing the tenets of virtualization to networking and thus creating the software defined networking market.

    Traditional networking uses integrated hardware and software to direct traffic across a series of routers and switches.

    The original use case for SDN was to virtualize the network by separating the control plane that manages the network from the data plane where traffic flows.

    There's a smart controller running specialized software that manages all network traffic in the data center, and a series of robberies and switches that forward packets of traffic.

    Virtualizing the network comes with advantages:

    Networks can be spun up and down dynamically, they can be fine tuned for specific application use cases, and security policies can be installed on each individual network.

    Today, the SDN market has evolved, and it's breaking out of the data center.

    SDN was being used in the Wide Area Network to control how enterprises connect to their branch offices.

    This use case, called SD-WAN, uses software to aggregate multiple types of network connections, such as broadband, MPLS or wireless to create strong and cost effective connections.

    Micro segmentation is the idea of using SDN for security.

    Certain networks can be ultra secure and carry sensitive data.

    Other networks can be public facing.

    So, if a hacker gets into a public facing Web server, they are restricted to the service segment of the network.

    This formats the hacker's ability taxed as any other segments, such as secure data center networks.

    SDN is also used in an area called network function virtualization or NFV.

    This is the idea of a place in specialized hardware like fire walls in load balances with software running on off-the-shelf server hardware.

    Some vendors are using SDN to connect data centers to public Cloud providers, creating a hybrid cloud network that includes her segmentation or dynamic scaling abilities.

    Other SDNs could be used to help manage the deluge of traffic from the Internet of Things, segmenting network traffic and helping to organize the data.

    SDN has evolved from a specific use case to being applied to many different areas of networking, both within the data center out the Cloud, and in the new world of IoT.

    As software is used to control the network, if becomes more agile and easier to manage, and it's ready to adapt to whatever use cases emerging in the future.

  3. …. Congratulations on the tutorial, Friend + 1 like here !! …. One question only, is it possible to change the response when a request is made to a network recursive DNS Server, changing response IP to IP from another machine on the network (redirecting to another gateway, my network intend to put 2 gateway)? ….Thank you very much !! …

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