After you configure a domain, you set up Oracle Web Tier or a third-party web tier.
For Oracle Web Tier, see Installing and Configuring Oracle HTTP Server or Installation Guide for instructions to do these tasks:
Install Oracle HTTP Server (OHS) or Oracle Traffic Director (OTD) in the same Oracle home as WebCenter Sites, or in a different domain.
Run the Configuration Wizard again to configure OHS or OTD to add it to (extend) the WebCenter Sites domain, or to create a standalone OHS or OTD domain.
Configure the mod_wls web server plug-in, which routes requests to Managed Servers.
For a third-party web server, see the documentation for the web server.