| Security & Bot Defense | |
| Basic HTTP authentication scheme that sends a username and password with each request | 18M sites |
| Web Servers & Operating Systems | |
| Nginx High-performance web server and reverse proxy widely deployed | 141.9M sites |
| Ubuntu Popular Linux operating system used for servers | 15.6M sites |
| other | |
| Ol-Asn | 60 sites |
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