Navigation link is not appearing into SharePoint site

I was getting “Quick Launch” and “Top Link Bar” links and wondering why “Navigation” link disappear from the Look and Feel section of the site settings then I have figured out that we need to activate “SharePoint Server Publishing Infrastructure” on site collection level feature. 

After activating this site collection feature, I am able to see navigation link and other two links goes away :)

Link: http://office.microsoft.com/en-us/sharepoint-server-help/configure-the-top-link-bar-for-site-navigation-HA102105259.aspx