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OSI Model has number of Layers

A. 4
B. 5
C. 6
D. 7

Answer & Solution
Option: D
Explanation :OSI model provides a standard for different computer systems to be able to communicate with each other. The International Standards Organization (ISO) developed the Open Systems Interconnection (OSI) model. OSI Model divides network communication into seven layers. In this model from layers one-four are considered the lower layers, and concern themselves with moving data around. Layers five-seven, called the the upper layers, contain application-level data. Networks operate on one basic principle: “pass it on.” Each layer takes care of a very specific job, and then passes the data onto the next layer.

    Layer 7 – Application
    Layer 6 – Presentation
    Layer 5 – Session
    Layer 4 – Transport
    Layer 3 – Network
    Layer 2 – Data Link
    Layer 1 – Physical

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