Multiple choice technology mainframe

What is the relationship of the Layered Network Models of TCP/IP, OSI, and SNA?

  1. SNA is an internal construction in z/OS and does not allow for end points.

  2. They are the same except that the OSI model inverts the layers top to bottom.

  3. They have the same layers with the exact same functions in each layer, but the names are different.

  4. The layers are conceptually similar but differ in name and details of what functions are in which layers.
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D Correct answer
Explanation

All three models use layered architecture for network communication, but they divide responsibilities differently. TCP/IP has 4 layers, OSI has 7, and SNA has varying definitions depending on context. They share concepts like physical/data link/network but organize them differently.

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