CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

What is the correct way to log out of HTTP authentication protected folder?

Is there a way to allow multiple cross-domains using the Access-Control-Allow-Origin header?

Question Part A ▉ (100 bountys, awarded) Main question was how to make this site, load faster. First we needed to read these waterfalls. Thanks all for your suggestions on the waterfall readout analysis. Evident from the various waterfall graphs shown here is the main bottleneck: the PHP-generated thumbnails. The protocol-less jquery loading from CDN advised by David got my bounty, albeit making my site only 3% faster overall, and while not answering the site's main bottleneck. Time for for clarification of my question, and, another bounty:

What advantages do either method offer for html, css and javascript files served by a LAMP server. Are there better alternatives?

When would you consider using one over the other and why?

I would like to redirect www.example.com to example.com. The following htaccess code makes this happen: