packet sniffer - meaning and definition. What is packet sniffer
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What (who) is packet sniffer - definition

COMPUTER NETWORK EQUIPMENT OR SOFTWARE THAT ANALYZES NETWORK TRAFFIC
Wireless sniffer; Packet Sniffer; Packet sniffing; Packet sniff; Packet capturing; Packet Sniffing; Wireless analyzer; Wifi scanner; Wifi analyzer; Packet capture; Deep packet capture; Deep Packet Capture; Network Packet Sniffer; Packet sniffer; Packet analysis; Packet analyzers; Network sniffers; Packet Capture; List of packet analyzers; Packet analyser; WAN analyzer
  • Screenshot of Wireshark network protocol analyzer

packet sniffer         
<networking, tool> A network monitoring tool that captures data packets and decodes them using built-in knowledge of common protocols. Sniffers are used to debug and monitor networking problems. (1995-03-28)
Packet analyzer         
A packet analyzer, also known as packet sniffer, protocol analyzer, or network analyzer, is a computer program or computer hardware such as a packet capture appliance, that can intercept and log traffic that passes over a computer network or part of a network. Packet capture is the process of intercepting and logging traffic.
data packet         
FORMATTED UNIT OF DATA CARRIED BY ALL PACKET-SWITCHING NETWORKS
Data packet; Data packets; Packet (information technology); Packet technology; Packet (computing); Packet (network); Packet data

Wikipedia

Packet analyzer

A packet analyzer, also known as packet sniffer, protocol analyzer, or network analyzer, is a computer program or computer hardware such as a packet capture appliance, that can intercept and log traffic that passes over a computer network or part of a network. Packet capture is the process of intercepting and logging traffic. As data streams flow across the network, the analyzer captures each packet and, if needed, decodes the packet's raw data, showing the values of various fields in the packet, and analyzes its content according to the appropriate RFC or other specifications.

A packet analyzer used for intercepting traffic on wireless networks is known as a wireless analyzer or WiFi analyzer. While a packet analyzer can also be referred to as a network analyzer or protocol analyzer these terms can also have other meanings. Protocol analyzer can technically be a broader, more general class that includes packet analyzers/sniffers. However, the terms are frequently used interchangeably.