Server on the Net

approximately the entire structure of the Internet is stand upon a client-server model. High- level root name servers, DNS servers, and routers straight the traffic on the internet. There are millions of servers connected to the Internet, running constantly all the way through the world.

Among the lot of services offer by Internet servers are:

• the World Wide Web(WWW),
• the Domain Name System (DNS),
• e-mail,
• File tranfer protocol (FTP) file transfer,
• instant messaging(IM),
• voice communication,
• streaming audio and video, and
• online gaming.

Nearly every action taken by an ordinary Internet user wants one or more interactions with one or more servers.

There are as well technologies that operate on an inter-server level. Additional services do not use devoted servers; for example peer-to-peer file distribution, some implementations of telephony (e.g., Skype), and supplying television programs to numerous users (e.g., Kontiki).