After this is evaluated, Emacs knows that the hostname dev.example.com must be accessed over SSH by a user called chris.
If you now try to find <tt>/sudo:dev.example.com:/etc/httpd/conf/httpd.conf</
tte> Emacs will automatically create the SSH connection first, prompting you for your password if necessary. Then it will prompt you for your sudo password. Once this is all done you will be able to modify the buffer as necessary. Saving the buffer will do what you expect: it will update the file on the remote server.
It is also possible to configure partial domains, for instance in case you need an SSH connection before modifying anything on <tt>*.example.com</tt>.
Hops can be chained, making this feature extremely powerful.