Ch-3


 * Chapter 3 Application Layer Functionality and Protocols **


 * 1) How do the functions of the three upper OSI model layers provide network services to end-user applications?
 * 2) How do the TCP/IP application layer protocols provide the services specified by the upper layers of the OSI model?
 * 3) How do people use the application layer to communicate across the information network?
 * 4) What are the functions of well-known TCP/IP applications, such as the World Wide Web and e-mail, and their related services (HTTP, DNS, DHCP, STMP/POP, and Telnet)?
 * 5) What are the file-sharing processes that use peer-to-peer applications and the Gnutella protocol?
 * 6) How do protocols ensure that services running on one kind of device can send to and receive from many different network devices?
 * 7) How can you use network analysis tools to examine and explain how common user applications work?