Wireshark-users: Re: [Wireshark-users] Understanding Wireshark / Sniffer Data

I'd appreciate if someone could recommend a good (cheap/free) resource to
understand the data captured using a sniffer like wireshark.

For example, the new "Expert Info" seems to pin-point certain important
events which helps analysis, but let's say for example it points out a
maformed packet with protocol SMPP....

What resource(s) could be used to understand what this means and try and
find a solution?

See also the Mail thread beginning at: