How we did it

The Network World 500 survey, conducted jointly by Network World and Research Concepts, includes data from four separate surveys of 125 participants each, totaling 500 organizations. Participating companies have multiple sites with internetworked LANs and WANs, and their annual spending on network related products totals more than $10 million. Some percentages might not add up to 100 because of rounding.

To continue reading, register here and become an Insider. You'll get free access to premium content from CIO, Computerworld, CSO, InfoWorld, and Network World. See more Insider content or sign in.

The Network World 500 survey, conducted jointly by Network World and Research Concepts, includes data from four separate surveys of 125 participants each, totaling 500 organizations. Participating companies have multiple sites with internetworked LANs and WANs, and their annual spending on network related products totals more than $10 million. Some percentages might not add up to 100 because of rounding.

Read more about software in Network World's Software section.