Enterprise mobility accelerates the trend towards centralisation and consolidation of information technology - in particular the management and governance of data. However, the mobile devices capable of running high-end IT applications and delivering gains in productivity also bring big security, management and compliance challenges. Enterprises are responding by bringing tools like smart phones, PDAs and even USB memory sticks within the realm of existing IT policies, support teams, and management systems. Often mobility is the last nail in the coffin for the data networking configurations that have dominated enterprise IT since the early 1990s: client/server is finally conceding to the 'big iron' it once looked like obliterating.