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  1. SD* - slow, but flexible, automatically reconfigurable and easily portable
  2. HD* - high speed, low portability, automatic configuration is limited or impossible

The general tendency is towards a concept “software-defined DC”, largely because of automation and management benefits it offers. The exception to tendency is bare-metal provisioning popularity that could be explained the still-existing demand for direct control over hardware, required some type of applications, independence from general software-system failures and speed.

Requirements in the network domain

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