As schools struggle with shrinking budgets and try to work around technology funding cuts, many are turning to OpenDNS, a free network security service that provides content filtering, anti-phishing security, and domain name system (DNS) resolution. 

DNS is a database system that translates a domain name or URL--which is how the average internet user calls up a web page--into an IP address. In essence, it takes the alphabetical name for a web site and translates it into the numerical IP address.

OpenDNS features more than 54 categories of blockable internet content, and the web sites listed in those categories are contributed largely...

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