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 ...

In this Nmap tutorial, get Nmap scan examples that show how to identify various devices on the network and interpret network data to discover possible vulnerabilities or infections.

Career choices range from very technical positions in network administration or programming to more communication-oriented employment in training or help desk support. A few of the possibilities are ...