WiTTyMinds

Pipes are nothing but two ended ,in daily life also we come across pipes .

In programming or in operating system context, One end is basically used to read and other end for writing. 

Python Syntax:-

r, w = os.pipe() # Pipe Created for Read and Write 

os.close(w) #close write before reading it

r = os.fdopen(r) print "reading" str = r.read()

   os.close(r) #close reading before  writing
   w = os.fdopen(w, 'w') #open Writing end 
   print "writing"
   w.write("Text written..")
   w.close()

Rather Than qualification, I would say skills.
Even a 10th Class pass person can be a good ethical hacker.
Only the companies which are hiring based on degree certificates would be a challenge otherwise to become an expert just below skills are required:-

1) Strong knowledge of Operating System and Commands ( Windows and Linux both including File System and Kernel, dlls etc.)
2) Networking (including router topology and protocols)
3) Network Protocols.
4) Problem Solving Skills
5) Visualization of power.
6) Algorithmic Design & Programming/Scripting languages knowledge.
7) Database knowledge.
8) Cross Platform(Windows, Mac, Linux)  knowledge and execution of tools.
9) Quickly able to understand/ adapt new languages or software tools.
10) Strong Puzzle-Solving Skills.
Etc Etc
Hope this information will help you.
All the Best.
Regards,
wiTTYMinds