Describe the evolution of social networks from their earliest appearance.

Describe four shared characteristics of social networks

If a large number of Internet users set Facebook as their primary destination on their web browser, should Facebook be considered a portal?

What business models do social networks use?

Identify and describe the main types of portals.

What are the benefits of Internet auctions to sellers, buyers, and market makers in an auction?

What are the costs and risks for buyers at an auction, and how have auction sites sought to reduce these risks?

What business models do portals use?