Question

There are______layer,_____layers and _________layers.

Answer 1

Answer:

there are 3 layers of earth ..

Explanation:

Crust , Mantle , Core

Answer 2

Answer:

In the OSI reference model, the communications between a computing system are split into seven different abstraction layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

Explanation:

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