Good explanation of what is all about CNAME and A record (Source: https://www.youtube.com/)

LifeFav Icon in Rails 3.2

Put the favicon.ico under your public/ folder Add <%= favicon_link_tag '/favicon.ico' %> to your <head></head> Create your helper method for favicon_link_tag  under a helpers folder…
This picture was taken from the book: “Code Complete – Steve McConnell” from the section call Problem Definition…