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rapport (introduction (Motivation, Previous Work, Research questions …

- - - - Traditional network architecture
      - Traditional networks limitations
        
        Management Complexity
        
        Difficulty to apply policies
        
        Scalability issues
        
        Equipment manufacture dependability
        
        Network ossification :warning:
    - - Logical layers
      - SDN switch
        
        physiqual switch
        
        software switch
    - - Operating principles
      - Flows based operation
      - OpenFlow enabled switch
        
        Actions taken on the flows
        
        Matching flows
        
        Flow Tables
        
        Counters
      - Control models
      - :warning: ForCES (Alternative to OpenFlow made by IETF )
    - - Advantage of SDN & SDN Applications ......... paper : A Survey on Software-Defined Network and
        OpenFlow: From Concept to Implementation
      - SDN weaknesses and challenges ( Scalability , Controller placement , Resilience)
    - - Beacon
      - Floodlight
      - OpenMul
      - Open IRIS
      - POX
      - NOX
      - Trema
      - Maestro
      - OpenDaylight
      - Floodlight
      - Ryu
      - ONOS
      - Paper : SDN Controllers: A Comparative Study
      - ftgh
    - - Early Programmable Networks : Intelligent Network, OPENSIG ,GSMP,Active Network ,architecture ,NETCONF,ForCES , Ethane
      - Historical Evolution of SDN
  - - - testBeds ( picture of some of them )
        
        Physical Testbed
        
        virtual Testbeds
      - Comparison of SDN OpenFlow Network Simulator
        and Emulators