a specialized hardware device or software in a desktop or laptop computer that captures packets transmitted in a network for routine inspection and problem detection
A device that simulates and tests a network.
Network monitoring device that maintains statistical information regarding the status of the network and each device attached to it. More sophisticated versions using artificial intelligence can detect, define, and fix problems on the network.
A network analyzer is an instrument used to analyze the properties of electrical networks, especially those properties associated with the reflection and transmission of electrical signals known as scattering parameters (S-parameters). Network analyzers are used mostly at high frequencies; operating frequencies can range from 9 kHz to 110 GHz http://www.home.agilent.com/USeng/nav/-536902444.0/pc.html Agilent - Network Analyzer products, as of 2 Jan 2007.