Question

What layer does Protocol JPEG belong to in the DOD model? and in the OSI Model? Port#? What does it stand for and what does it do?

A) DOD Model: Presentation, OSI Model: Presentation, Port: 422, Stands for: Joint Photographic Experts Group, Function: Image format at the presentation layer
B) DOD Model: Network, OSI Model: Network, Stands for: JPEG Network Protocol, Function: Networked JPEG communication
C) DOD Model: Transport, OSI Model: Transport, Port: 123, Stands for: Joint Photographic Transport Protocol, Function: Transport layer for JPEG
D) DOD Model: Application, OSI Model: Application, Port: 320, Stands for: JPEG Application Protocol, Function: Application layer for JPEG

Answer 1

JPEG stands for Joint Photographic Experts Group and is used in the Application layer of both the DoD and OSI models. It is a popular image format due to its color depth and compression abilities.

Step-by-step explanation:

The Joint Photographic Experts Group (JPEG) format is a widely used method for compressing digital images, primarily photographs. The JPEG format belongs to the Application layer in both the Department of Defense (DoD) model and the Open Systems Interconnection (OSI) model. It is not directly associated with a specific port number since it is a file format and not a network protocol. JPEG is favored for digital photos due to two main reasons:

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• It can display millions of colors, making it suitable for photos which are rich in color depth.
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• The compression algorithm of JPEG reduces the file size significantly, making it possible to store more images in less space without greatly compromising image quality.