Landing Page for Private Site using Multisite Privacy

Quick question here, hopefully...

What type of landing page are site visitors presented with if Multisite Privacy is activated and set to only allow access to registered users? Do they just see the WordPress login screen?

I'll be creating a new private intranet site with content only for registered users, but I want the home page of the site to show visitors a message and link to the public site. I'd then also have a link for members to log in and access the intranet site. There may be a Contact page that should be public too.

With just one level of access and protected content, I'm not sure I need all the bells and whistles that Membership offers...though I'm still considering that.

Thanks in advance for any feedback!