Overview of Traditional Network Traditional network is totally based on Routers which routes the packet from source to destination by using routing protocols like OSPF,EIGRP etc. Every router is maintaining routing table which holds the information about the neighbour networks; by using that information they will forward the packet from source to destination. Router is intelligent internetworking device which decide which path has to be adopted by using routing protocols. Every router is getting the information about neighbour networks by incremental updates. In simple word router is composed of two plane   Control Plane Data forwarding plane Limitations in Current Network Switches with vendor-specific architecture prevent dynamic configuration based on application-specific requirements. Switches must be configured in accordance with the installed operating system (OS). In a typical network, centralised control is not possible. What is Software Defined Networking in IOT ...

    Address Mapping:  Ø The  delivery of a packet to a host or router requires two levels of addressing: Logical and physical. Ø    We need to map logical address to its corresponding physical address and vice versa. Ø    This can be done by  Static mapping and Dynamic mapping. Ø    Static mapping  involves in the  creation of a table that associates a logical address with a physical address.  This address mapping table is  stored in each device  on the network. Ø    Static mapping has some limitations because physical addresses may change in the following ways: ·       A machine could  change its Network Interface Card (NIC)  , which results in a new MAC address. ·        In some Local Area Networks(LAN), such as  Local Talk, the MAC address changes every time the computer is turned on. ·    ...