The advantage to hardware firewalls is that hackers and malware can't reconfigure it nearly as easily as software firewalls. Software can be easily compromised because by nature it is easily modifiable, while hardware is not. At the same time, this allows software to be upgraded and updated easily (and a lot cheaper).
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It's not a car, it's an addiction.
The only carb that matters is under the hood.
There's an option for most vehicles that increases brake horsepower, increases mileage, increases driver control, lasts longer than the alternative, and even reduces the price of the vehicle. Despite all this, most people in this country choose the alternative, an automatic transmission.
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