title: Edge direction in network diagrams
body: <p>When I draw a network diagram with, say, browser A communicates with http-server B which talks to a database C, I draw the nodes for A, B and C and edges between A and B and between B and C. Then I want to materialize the flow direction by adding arrows. On which side should I place the arrowheads?</p>
  
  <p><a href="http://www.forteresse.net/site/stack-overflow-question/image" rel="nofollow noreferrer">alt text http://www.forteresse.net/site/stack-overflow-question/image</a></p>
  
  <p>Variant 2 is the intuitive one, but IMHO, the variant 1 is the correct one since the data is really flowing from B towards A.</p>
  
  <p>I want to indicate that the browser is accessing the http-server for reading a web page, for example A is browsing <a href="http://www.xyz.com" rel="nofollow noreferrer">http://www.xyz.com</a></p>
  
  <p>So, are there any references to help me on this?</p>