The OSI Model by Example - The Backend Engineering Show with Hussein Nasser
The Backend Engineering Show with Hussein Nasser
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Layer Four - Application Design
layer four has many jobs, but let's assume we're using the TCP protocol for now. The first thing you layer four does is deals with application ports. There are many processes that needs communication with the other world. They can't just use the same port, otherwise, because you guys are using the same IP address.
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