Rui,
If the slides and user guide don't provide enough insight, and you really are interested in learning about the protocols, you are probably going to hunt around for some good documentation that covers the protocols. Most protocols are described in the RFC, so head to 
http://ietf.org for these. There are some good books around on services like LDAP - usually you can't go wrong with books from O'Reilly.
Just remember, Wireshark is much like a stethoscope to a cardiac surgeon. Unfortunately to become a cardiac surgeon you need lots of training and experience to understand what the stethoscope is telling you!
Regards, Martin
MartinVisser99@xxxxxxxxx
On Wed, Dec 3, 2008 at 4:25 AM, Cabral, Rui 
<Rui.Cabral@xxxxxxxxx> wrote:
Hi all, 
 
I am new with using 
wireshark, I have the User Guide which I use to learn how to use wireshark, 
nevertheless I wonder is anyone has or know if I can find a documentation or 
explanation on how to look at the capture file I have. For exemple if I do a 
capture on a LDAP authentication that is failing, I seen the protocols and but 
what does each line means.. 
 
Is there any "how to 
look(understand) at a capture log"
 
Allt he 
best,
 
 
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