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Enterprise IT infrastructures now face such an explosion of applications, devices, and data that just running in place is hard enough. Nobody seems to have the time or resources to design new systems that actually improve operations. Nonetheless, there's one step you can take to make life easier and your infrastructure stronger as you deal with rampant growth: introduce logical separation wherever you can.
It doesn't really matter whether you're talking about segregating compute bandwidth, storage capacity, networking gear, or different types of data; the reasoning is the same. Maintaining solid performance, tight security, high efficiency, and easy manageability all require thoughtful partitioning of different types of services and data -- partitioning that's often extremely difficult or even impossible to do after the fact.
The process will vary greatly depending upon which technology you're working with. But one common thread should run through every level of your infrastructure: Keep it separated.
Segregating the network
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