The first part of a complete URL that is required to access the web resource is the

The first part of a complete URL is the protocol, such as http or https, which tells how to access the resource.

Address is a loose description of the whole URL, not its required first component.

Name alone does not identify the leading scheme portion of a URL.

Location describes what a URL points to overall rather than its opening protocol field.

After the protocol come the domain name and then the path to the specific resource.

The protocol is followed by the :// marker before the host name in a typical URL.