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10 Free Or Low-Cost Network Discovery And Mapping Tools

Understand your network so you can defend it better

A lightweight, simple IP scanner, Angry IP Scanner uses a multithreaded scanning technique to offer speedy scans with results that can be saved to CSV, TXT, XML, or IP-Port list files. Offering a flexible Java-based framework, the tool can be easily extended through plugins to gather additional information about scanned IPs.

http://angryip.org/w/Download

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