A software interface between the transport protocol (layers 3 and 4) and the data link protocol (layers 1 and 2) in the protocol stack. The interface provides a protocol manager that accepts requests ...

A virtual LAN is a logical division of a network that enables devices to communicate as if they are connected to a single switch. These divisions are critical to network security, performance and ...

Hands-on with the Pktmon network monitor Compared to a network monitor with a graphical user interface, the command-line interface of Pktmon takes a bit more time to get used to it. Before you can ...

The ifconfig command can tell you a lot about your Unix server’s connection to your network and the role it’s playing in both generating and receiving network traffic. The newer ip command does much ...

Erik Eckel explains how to use three common commands to find networking issues and troubleshoot them. The Mac’s Systems Preferences Network applet enables configuring network settings, while the ...

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 ...

The phrase "sniff the network" may conjure Orwellian visions of a Big Brother network administrator reading people's private email messages. Before anyone uses Wireshark, an organization should ensure ...