All networks have vulnerabilities, but how do you find them? By using networkd vulnerability assessment (NVA) tools to look at every IP address on your network and test the service or device using that address. Even more important, you need assessment tools that work from the outside in, so you can test your network the way the hackers will. By using regular assessments, you can shut all the openings in your network before the hackers find them. Jesper Jurcenoks, CTO of NetVigilance, maker of network vulnerability assessment software, says regular NVA use gives you the most important security information: what's on ...