1. Many kinds of clients and servers This work is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 License. Skills: none IT concepts: servers that serve other computers, servers in devices

2. Where does this topic fit? Internet concepts –Applications –Technology –Implications Internet skills –Application development –Content creation

3. Retrieving Web pages is only one client-server application. There is a wide variety of others.

4. Where is the server in this picture?

5. The print server A computer inside Connected to a local area network Programmed to offer a service Printing pages is the service The program never changes – it is in read only memory Servers can interact with the physical world as well as the virtual world.

6. Servers are often called by programs rather than people This page came from an Amazon server. Amazon retrieved this information from a UPS server.

7. A few questions

8. If a vending machine were connected to the Internet, what sort of service might it provide to the owner of the machine or a potential customer?

9. Network servers offer a great variety of services to users and to other computers. Printing pages Backing up and retrieving stored files Returning the exact time of day Processing credit card transactions Looking up words in a dictionary Retrieving data from a database Turning machines or appliances on or off Converting the text on a page to an audio speech file Converting a PDF file to Word format and vice versa Sending and receiving email Transferring files from one computer to another Can you add to this list?

10. Would the computer in the print server be more likely to run Windows or some other operating system? Would the computer in the print server need to run TCP/IP software?

11. Many kinds of clients and servers This work is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 License. Skills: none IT concepts: servers that serve other computers, servers in devices