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Are you talking about physical filters - like those for air or electricity, or filters that block unwanted software or other web-sourced items or code that might cause harm to that device? There are also filters that PREVENT a user or that particular machine from accessing particular connections, like parental controls that lock out of certain channels on a TV or websites on a computer.
All types are meant to prevent something unwanted or nasty for coming in contact with the device in question.
| 14 years ago. Rating: 1 | |
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