How do the Internet and Internet technology work and how do they support communication and e-business?

How do the Internet and Internet technology work and how do they support communication and e-business?    
Define the Internet, describe how it works and explain how it provides business value. Explain how the Domain Name System (DNS) and IP addressing system work. List and describe the principal Internet services. Define and describe VoIP and virtual private networks and explain how they provide value to businesses. List and describe alternative ways of locating information on the Web. Compare Web 2.0 and Web 3.0.