For network admins and network security professionals, one of the most important tools to learn to use is Wireshark (formerly Ethereal), a free and open source network analyzer/packet sniffer software ...

Though its broad use in industrial applications was in question just a decade ago, few people today would argue with the fact that Ethernet has fast become the preferred industrial network ...

If you are like most people, your home or small office wireless router probably is running without any encryption whatsoever, and you are a sitting duck for someone to easily view your network traffic ...