canonical
The preferred page URL for search engines.
Glossary
A concise technical glossary for IP, DNS, Whois, SSL, HTTP, HTTPS, redirects, robots.txt, sitemap.xml, canonical and meta tags.
DNS
A system that connects domain names with technical records.
HTTP headers
Technical request or response fields in HTTP.
IP address
A unique network address of a device or server.
robots.txt
A file with crawl instructions for search robots.
sitemap.xml
An XML map of important website URLs.
SSL
Certificate technology used for secure HTTPS connections.
Whois
A service that returns registration information for a domain.