That is to say, if we analyze the OSI model at the Open Systems Interconnection 7 Layer network model, there has been a focus on shifting the 4 main layers between the Application and Transport layers to allow cloud-delivery for things like storage, applications, and compute.
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However, most business functions require physical hardware, routers and switches, and an MPLS network to transport endpoints across the internet and within the data center.
Similarly, these functions always resided in the network Layers 1 to 3; this meant renting or owning expensive pieces of hardware that become obsolete with time and being tied to multi-year contracts for a specific circuit.
In addition, arranging network services requires several months, which keeps IT networking budgeted and planned for a fixed cost needing to be appointed over long-term periods.
In the same vein, this means the network is in opposite to the cloud potential as a scalable, flexible, and on-demand resource. On the other hand, when you are able to set up a new Infrastructure-as-a-Service (IaaS) instance in real-time publicly; and to the dedicated network connection of the assets and resources that usually takes weeks to organize.
