The three basic issues of the data link layer are: frame delimitation, transparent transmission, and error detection; the reasons that must be solved: frame delimitation is an inevitable requirement for packet switching; transparent transmission avoids message symbols and frame delimitation Boundary symbols are confused; error detection prevents invalid data frames with errors from wasting transmission and processing resources on subsequent routes.
The operating environment of this tutorial: Windows 10 system, Dell G3 computer.
Three basic issues of links in the data link layer:
Frame delimitation (encapsulation into frames)
Transparent transmission
Error detection
Why must it be solved?
Reason:
Encapsulation into a frame is to add a header and a tail before and after a piece of data. In order for the receiving end to identify the start and end of the frame from the received bit stream, frame delimitation is an inevitable requirement for packet switching; Obfuscation;
Prevent invalid data frames with errors from wasting transmission and processing resources on subsequent routes
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