From Look@Net Software:
With Professional Look at Net learn more about network protocols, hosts, ports and packets with our network monitoring tools - "professional Look at Net", portable network monitoring utility for Microsoft Windows 2000/XP/2003 OS. Portable features (run on flash-drive) possible only registered version. The Network scanning don't required network administrator privilege, only host administrator right require for silent scanning and IP packets capturing. Possible auto save 500, 2000 or 5000 capturing packets, with viewing saved and capturing packets in ASCII and HEX (hexadecimal) mode. Also possible viewed any other (no packets) source in HEX mode.