From Etherscan: Etherscan Analyzer is an advanced network sniffer and protocol analyzer for Windows. It can capture and analyze all packets transmitted in your segment of the local network. Etherscan decodes all major protocols, including Ethernet, NetBEUI, TCP/IP, and TCP/IP utilities. It is capable of reconstructing TCP/IP sessions. Version 1.2 build 1237 may include unspecified updates, enhancements, or bug fixes.
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