Pear to pear application

In what cases we are using Pear to pear protocal in wcf

In what cases we are using  Message quary protocal in wcf 

give breaf information about on it parts witrh example

Hi,

Its great questsion, because many of us, we dont know which binding is good for particular situation.no worry, here is way of choosing right binding in WCF

http://weblogs.asp.net/spano/archive/2007/10/02/choosing-the-right-wcf-binding.aspx

Thank you