What is protocol analyzer ?

Protocol analyzer is any device that captures and interprets the network traffic between two or more connected computer systems. The traffic can then be decoded so that it is possible to see what processes are occurring. By examining the flow of traffic, protocol analyzers can be used to find out where problems (such as bottlenecks or the failure of a network device) are on a LAN. 

Advanced protocol analyzers can also provide statistics on the traffic that can help to identify trends that may in future lead to further problems with the network.

Also See

protocol analyzer examples
protocol analyzer wireshark
protocol analyzer hardware
wireless protocol analyzer
serial protocol analyzer
protocol analyzer and packet sniffer
protocol analyzer open source
protocol analyzer vs port scanner

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