How do I know that my firewall is really protecting my network?
Just like any security system, a firewall should, periodically, be tested. To test a firewall, you could have a professional security-consulting company do a security vulnerability scan. However, this is usually something you can do yourself. To do this, you could use a port-scanner or a more advanced tool like a vulnerability assessment tool (such as Retina, Saint, or ISS).
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What were the top five stories that shaped 2009? From the launch of Microsoft's Windows 7 OS, to the departure… Watch it now
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| Apple iPhone 3GS 32GB | 35 plans |  16% |
| Apple iPhone 3GS 16GB | 35 plans | 3% |
| Blackberry Curve 8520 | 6 plans | 1% |
| Apple iPhone 8GB | 41 plans | 1% |
| Samsung Galaxy Icon | 6 plans | 1% |
| Apple mobile phones | 19% |
| Nokia mobile phones |  7% |
| Sony Ericsson mobile phones | 3% |
| Samsung mobile phones | 4% |
| Blackberry mobile phones | 1% |
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