Greetings @shahab1998. Thank you very much for participating in the fixed course N°2 for newcomers in SteemitCryptoAcademy. Your grade on this assignment is as follows:

GRADE: 6.7

Remarks:

The observations that I will leave in this publication, are of general form with respect to all the content:

• Presentation: Your presentation was fine, I could read in a running form your publication, there was order in the paragraphs you wrote, however, you can do much better, such as justifying the text and adding text separators to divide the sections of the selected question.

• Your definition of Decentralization: In this section, you were able to express what decentralization really means, however, do not forget that also decentralization does not have a central node, since, this used many servers to be able to expand its network and decentralize it, which makes it much more secure and immutable.

• The advantages of decentralization: In one of the advantages you commented in a centralized system the central authority can access the data at any time, however, in the decentralized one the many nodes, can also access this information, but with the difference that they cannot modify the data and in the centralized one if, you should have commented this difference.

• The Disadvantages of Decentralization: In your disadvantages you have several errors and inconsistencies, there is no higher cost in decentralized nodes, anyone can be a node, it is more expensive a centralized node which must load only with a network, than millions decentralized that share the load of the same. It was not clear one of the disadvantages that you placed regarding filing complaints to an authority, also certainly decentralized systems have a higher degree of complexity, but just by reading or studying a little how it works we can work on it, it is not impossible, you don't have to be an experienced developer to do it.

• Areas of life where a decentralized system is useful: You mentioned digital identification and this is a mistake, since, in centralized systems, we are asked for a lot of confidential information to register an account in the entity, which can represent a danger to our integrity, but decentralized systems eliminate this, and can keep us anonymous without showing our confidential information, in this way, a Blockchain project that is based on collecting confidential information without losing it, I would not support it, it can be dangerous.

My comments and/or Suggestions.

My recommendation is that you take the time to be able to study in a more detailed way the lectures of the professors, so that in this way you do not confuse some of the terms that you have to describe according to the assignments of the professors.

Also, improve your presentation a bit more, you can do much better.