↑ “How many active sites are there?”. Netcraft (bằng tiếng Anh). Bản gốc (html) lưu trữ ngày 30 tháng 4 năm 2013. Truy cập ngày 14 tháng 7 năm 2018. Circa 1996-1997, the number of distinct IP addresses would have been a good approximation to the number of real sites, since hosting companies would typically allocate an IP address to each site with distinct content, and multiple domain names could point to the IP address being used to serve the same site content. However, with the adoption of HTTP/1.1 virtual hosting, and the availability of load balancing technology it is possible to reliably host a great number of active sites on a single (or relatively few) IP addresses.
