Traditionally, if you were adding capacity to your network – maybe to bring a new branch online, support an expanded workforce, or just to handle greater demands on data – you’d probably need to procure some hardware: routers, firewalls, accelerators and so on. Then you’d need someone to install and maintain it all. That would take considerable time, capital and resources.
"The technology is now moving beyond the big service providers’ servers where it began life. VNFs replicate specific network functions that previously sat on individual, proprietary hardware boxes and would have traditionally had to be accessed and configured manually."