Chapter 9 Review Questions

5. Explain the relationship between the client/server model and the fact that different users might experience different interfaces while accessing the same data. 
The client/server model works in which a client programs requests information and a server program delivers the requested information, and the client program hides the details of the network and the server from the user. Different users can access the same server with varying applications with different user interfaces. The connection they're using depends on the view of the interface they access.

9. Why is file compression important to the Internet? 

The smaller the file is the less time it takes loading as it requires less bandwidth.
 

11. How does push technology differ from standard Web page delivery techniques? How is it used?

A standard Web page sues pull technology rather than push technology . Pull technology allows browsers to request information before it's delivered. Push technology differs as it delivers the information automatically, e.g. RSS.

12. What new services are available as a result of the commercialization of the Internet? What new problems are arising of that commercialization?

New services include: view weather patters, book flights, buy stocks, sell cars, track deliveries, listen to radio broadcasts (live or record), ...

Problems include: online scams, Web site sabotage, online stalking, pornography hustling, identity theft,...