A Forrester Research analyst says sellers of virtual private networks (VPN) and firewalls have "achieved a rarity in the IT market – they've under-promised and over-delivered." The think firm's Laura Koetzle bases her assessment on the results of a recent survey of 878 technology-decision makers at major North American companies. She says IT security concerns matched to buyers' "remarkable" satisfaction with service and performance expectations are leading to a boom market in those security technologies. Here are the survey findings in graphic form:

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