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The IBM i system uses a data stream approach to interact with both dumb terminals and the various types of emulation software that exist for the IBM i. Essentially, data sent from the IBM i to the emulator consists of a stream of encoded characters that describe the screen that is displayed by the emulator. This stream is sent as discrete packets of data, which the emulator receives, interprets, analyzes, and formats into a recognizable screen. When you enter data on the screen and press either Enter or a command key, the emulator encodes this data into the data stream format prior to sending it back to the IBM i.
The data stream normally contains both static data and dynamic data. Static data is text that does not change, such as screen titles. Dynamic data includes all input fields and some output text that may change.
Web Option utilizes the 5250 data stream to run an interactive job with the IBM i. When you access your IBM i from a browser using Web Option, the IBM i is unaware that you are not directly connected to the IBM i and treats your Web Option session as a normal interactive job.
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