You can configure the Update Manager server to download patches and extensions either from the Internet or from a shared repository. You can also import patches and extensions manually from a ZIP file.
Configuring the Update Manager download source is an optional step.
If your deployment system is connected to the Internet, you can use the default settings and links for downloading upgrades, patches, and extensions to the Update Manager repository. You can also add URL addresses to download third-party patches and extensions. Third-party patches and extensions are applicable only to hosts that are running ESXi 6.0 and later.
If your deployment system is not connected to the Internet, you can use a shared repository after downloading the upgrades, patches, and extensions by using Update Manager Download Service (UMDS).
For more information about UMDS, see Installing, Setting Up, and Using Update Manager Download Service.
For detailed descriptions of the procedures, see Configuring the Update Manager Download Sources.