Protocol analyzer (also known as a network analyzer, packet analyzer or sniffer, or for particular types of
networks, an Ethernet sniffer or wireless sniffer) is computer software or computer hardware that can intercept
and log traffic passing over a digital network. As data streams flow across the network, the sniffer captures
each packet and, if needed, decodes and analyzes its content according to the appropriate RFC or other
specifications.
Answer option D is incorrect. Performance Monitor is used to get statistical information about the hardware and
software components of a server.
Answer option B is incorrect. A spectrum analyzer, or spectral analyzer, is a device that is used to examine the
spectral composition of an electrical, acoustic, or optical waveform. It may also measure the power spectrum.

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