In the November 2011 survey, we received responses from 525,998,433 sites, giving a rise of 22 million (+4.3%) since last month.
Once again, all of the major web server vendors gained sites this month; however, Apache showed a greater rise of 15.9 million sites this time, allowing it to claw back some of the market share it lost last month. Microsoft showed the second largest absolute gain of 2.3 million sites, although this was not enough to prevent its market share falling by 0.21 percentage points. nginx also suffered a small loss in market share after reaching its all-time high of 8.54% last month.
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