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

[mv652@xxxxxxxxxxxx]

Hi, 

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? 


I know there are excellent and not very expensive pay services associated 
with wireshark, but I'm looking for someone on an extremely tight budget but 
wants to learn. 


Thanks,
Mario