Content filters are devices that restrict or allow traffic based on the information contained in the packets traversing the network. This is generated primarily for security reasons. You might want to control documents that go out of the company and restrict sensitive materials from being leaked to unauthorized destinations. This corporate control ensures the desired confidentiality and privacy level within an organization.
Another reason to use content filtering is preventing users from viewing inappropriate content and this might happen in both enterprise environments (content that is not safe for the organization) and home environments (parental control). From a high-level . . .
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