To activate HTTPS on an Apache web server after configuring the certificate and private key paths, the SSL module must be enabled and the Apache service must be restarted or reloaded.

### Why this is right The described setup enables Apache’s secure web server module with `sudo a2enmod ssl` and restarts the service. The virtual host configuration then specifies that secure connections are enabled and gives the certificate and private-key file paths. ### The concept A certificate is not used by a web server merely because the files exist on disk. The server software must be configured to use the certificate and its matching private key. The provided Apache configuration places the site in a virtual host listening on port 443, enables secure connections for that host, and names the certificate and key files. Enabling the module and restarting Apache applies the configuration changes. The private-key file must be accessible to the server process while still being protected from unauthorized access. ### Terms - **Apache**: Web server software that can host sites and be configured for secure connections. - **Module**: An added software component that provides a feature, such as secure-connection support. - **Virtual host**: A web server configuration block for a particular site or network address. - **Certificate**: A signed record associating a server identity with a public key. - **Private key**: The secret key corresponding to the public key in the certificate. - **Port 443**: The network port used by the virtual host in the supplied secure-site configuration. ### Remember Issuing a certificate and configuring the web server to use it are separate steps.