... information on the Web was to use Internet search engines like Infoseek, Google or Alta vista, subject directories such as Yahoo!, or online database services such as Lexis-Nexis and Dialog. These services are time consuming because they require the user to be active and searching and filtering through the information.Push clients such as PointCast (fig 1.5), and push services such ... ...
... model but the application layer has different function in each model. The application layer on the TCP/IP reference model handles the high-level protocols, issues of representation, encoding, and dialog control. The TCP/IP combines all application-related issues into one layer, and assumes that the data is properly packaged for the next layer. Combination of presentation and session layer ... ...
... , electronic delivery will be the most appropriate or even the only choice. On the negative side, "computer-enhanced classroom put a computer between the student and the instructor and can make dialog more difficult. Computer teaching tools can mimic entertainment, foster a passive mode of learning, and short attention span. They can also detract from the reflective thinking needed to develop an understanding ... ...
... information on the Web was to use Internet search engines like Infoseek, Google or Alta vista, subject directories such as Yahoo!, or online database services such as Lexis-Nexis and Dialog. These services are time consuming because they require the user to be active and searching and filtering through the information.Push clients such as PointCast (fig 1.5), and push services such ... ...
