The June Netcraft Results are Out: Apache Gains Slightly in Market Share

By ServerWatch Staff (Send Email)
Posted Jun 30, 2001


The Netcraft Web Server Survey is a survey of Web Server software usage on Internet connected computers. We collect and collate as many hostnames providing an http service as we can find, and systematically poll each one with an HTTP request for the server name.
In the June 2001 survey we received responses from 29,302,656 sites. Apache slightly gains in market share in the monthly Netcraft survey. Also worth noting: this month there's a slew of information about what OS platforms power the public Internet.

Market Share for Top Servers Across All Domains August 1995 - June 2001

Top Servers

ServerMay 2001PercentJune 2001PercentChange
Apache1806960362.241846615363.020.78
Microsoft-IIS595724020.52597232120.38-0.14
Netscape-Enterprise17789586.1317686736.04-0.09
Zeus7987452.758101082.760.01

Active Sites

DeveloperMay 2001PercentJune 2001PercentChange
Apache723008961.53734602562.420.89
Microsoft306294926.07307662326.140.07
iPlanet3247222.762732932.32-0.44

iPlanet is the sum of sites running iPlanet-Enterprise, Netscape-Enterprise, Netscape-FastTrack, Netscape-Commerce, Netscape-Communications, Netsite-Commerce & Netsite-Communications.

Microsoft is the sum of sites running Microsoft-Internet-Information-Server, Microsoft-IIS, Microsoft-IIS-W, Microsoft-PWS-95, & Microsoft-PWS.

Platform groupings are here.

Counting computers running the Web

Introduction

One of the common observations made about the Web Server Survey is that it counts hostnames rather than physical computers, and so is not a suitable metric to indicate hardware installed base or license sales. Technically sophisticated hosting companies can run several thousand sites on a single computer, and the great majority of the world's web sites are located at hosting and co-location companies rather than on peripheral networks.

Building on the operating system detection techniques used by the What's that site running? query and Netcraft's commercial research, we have attempted to address this. Netcraft has developed a technique that, with an error margin, can give an indication of the numbers of actual computers we find on the Web, together with the operating system and web server software used.

By arranging for a number of IP addresses to send packets to us near simultaneously, low level TCP/IP characteristics can be used to work out, within an error margin, if those packets originate from the same computer, by checking for similarities in a number of TCP/IP protocol header fields. To build up sufficient certainty that IP addresses on the same computer have been identified many visits to the sites in the Web Server Survey are necessary, which takes place over a period of over a month.

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