| http://www.w3.org/ns/prov#value | - Firewalls, intrusion-prevention systems, and other security elements that have become standard components of data networks are still emerging for VoIP, despite the rapid adoption of the underlying VoIP technology; IDC says VoIP expenditures hit $2.9 billion last year, and are expected to grow to $6.9 billion by 2011.
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