The requested URL could not be retrieved

While trying to retrieve the URL: http://dgafpconcours.monportail.alize/gcp/webdav/site/dgafpconcours/shared/les_ecoles/Ecole_Polytechnique_20081217.pdf

The following error was encountered:

Unable to determine IP address from host name for dgafpconcours.monportail.alize

The dnsserver returned:

Name Error: The domain name does not exist.

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