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README_ENG.md

@@ -2213,9 +2213,43 @@ Testing is the process of assessing that all parts of the program behave as expe
 
 -   ### Monolithic and microservice architecture
 
+    <p align="center"><img src="./files/building-architecture/monolith-microservices_eng.png" alt="Monolith and microservices"/></p>
+
+    A monolith is a complete application that contains a single code base (written in a single technology stack and stored in a single repository) and has a single entry point to run the entire application. This is the most common approach for building applications alone or with a small team.
+
+    -   Advantages:
+        > -   Ease of development (everything in one style and in one place). <br>
+        > -   Ease of deployment. <br>
+        > -   Easy to scale at the start.
+    -   Disadvantages:
+        > -   Increasing complexity (as the project grows, the entry threshold for new developers increases). <br>
+        > -   Time to assemble and start up is growing. <br>
+        > -   Making it harder to add new functionality that affects old functionality. <br>
+        > -   It is difficult (or impossible) to apply new technologies.
+
+    A microservice is also a complete application with a single code base. But, unlike a monolith, such an application is responsible for only one functional unit. That is, it is a small service that solves only one task, but well.
+
+    -   Advantages:
+        > -   Each individual microservice can have its own technology stack and be developed independently. <br>
+        > -   Easy to add new functionality (just create a new microservice). <br>
+        > -   A lower entry threshold for new developers. <br>
+        > -   Low time required for buildings and startups.
+    -   Disadvantages:
+        > -   The complexity of implementing interaction between all microservices. <br>
+        > -   More difficult to operate than several copies of the monolith. <br>
+        > -   Complexity of performing transactions. <br>
+        > -   Changes affecting multiple microservices must be coordinated.
+
 <details>
     <summary>🔗 <b>References</b></summary>
-</details>
+
+1. 📺 [**What are Microservices?** – YouTube](https://youtu.be/CdBtNQZH8a4)
+2. 📺 [**Microservices Explained and their Pros & Cons** – YouTube](https://youtu.be/T-m7ZFxeg1A)
+3. 📺 [**Microservice Architecture and System Design with Python & Kubernetes – Full Course** – YouTube](https://youtu.be/hmkF77F9TLw)
+4. 📺 [**NodeJS Microservices Full Course - Event-Driven Architecture with RabbitMQ** – YouTube](https://youtu.be/Zc2mQSQXoS4)
+5. 📺 [**Building Microservices in Go (playlist)** – YouTube](https://youtube.com/playlist?list=PL7yAAGMOat_Fn8sAXIk0WyBfK_sT1pohu)
+6. 📄 [**Awesome Microservices: collection of principles and technologies** – GitHub](https://github.com/mfornos/awesome-microservices)
+ </details>
 
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