Security Basics: Security Auditing ?

[aditya.mukadam () gmail com]

Hello !

First of all, thanks everyone for sharing knowledge ! Also, sorry for a very broad question below.

As per industry standards/job market :-) ,  Security Auditor should have which certifications ? or , which 
certifications are recommended
to be a Security Auditor ?

 I understand that certification is not everything however the relevant experience is also needed.Which are the 
recommended areas in
which a Security Auditor should have experience in ? Network Security,Pen test etc ?

Thanks,
Aditya Govind Mukadam