Although the cloud can provide incredible value to organizations by providing cost-effective services and applications, multi and hybrid cloud environments create various network configurations for access and deployment. In order to ensure maximum value and reliability of cloud services and resources, organizations need to determine how they prefer to consume technology before determining the best network connectivity model as well as service providers to meet business needs.
Public networks are anything utilizing thepublic Internet;all this traffic "shares" the same backbone/infrastructure, whereasaprivateconnectionuses a carrier's private backbone to ensure customers’traffic is segmented and cannot be viewed or controlled by others.
Private connectivity comes into play when you need to ensure prioritization of traffic classes and meet specific SLAs on jitter, latency, and throughput. Public internet does not honor QoS,and latency-sensitive applications are best placed over a private connection
You are certainly welcome to do this if you have the equipment to load balance across the connections;however,from a redundancy standpoint, if one line is cut or there are issues upstream, both lines will suffer.
While the local LECs(local exchange carriers)and cable companiestend to have the major share of network facilities in any given area, aggregators and CLECs(competitive local exchange carrier)can provide an alternative option using the same service. Alternately, if you are in the densely populated metro, there are likely other network providers in the area that are competing against the LECs and cable companies that could provide additional service options.
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