![]() Feel free to correct me and write your comments in the comment box. However, I am trying to explain whatever I understood about these concepts. Then you must aware of networking terminologies. If you are software developer and want to become cloud architect. Therefore, I would advise you must first concrete all these terms before or while you learn Azure. ![]() And that is the big hurdle in learning Azure Cloud Concepts. Even though you have given the Azure Fundamental Exam you will find many terms that you are not aware of. While learning Azure the main hurdle is the terms that are used in Azure Concepts. Why do we need them? What is the role of firewall in a Network and how firewall works with NAT, DNAT? Are you also seeking answers for these type of questions like I did? Read the article to get your answers! Furthermore, IP addresses work at Layer 3, and Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) port numbers operate at Layer 4.Difference between NAT vs Firewall for Software Developers ![]() The network layer enables data transfer between two networks and performs routing functions, while the transport layer manages, sends, and receives end-to-end communication between devices by dividing data into segments. However, firewalls typically operate at Layers 3 and 4, the network and transport layers. ![]() ![]() Within this are two sub-layers, the media access control (MAC) and logical link control (LLC) layers. It breaks packets into pieces, or frames, and handles the flow and error control of the data. Within the OSI model, Layer 2 is the data link layer, which enables data transfers between devices on the same network. It categorizes the functions of network components and outlines the rules and requirements that support the hardware and software that comprise the network. OSI is a framework that characterizes and standardizes communications protocols and describes the functions of networking systems, such as telecommunications and computing systems. A key feature of transparent firewalls is that they sit in Layer 2 of the Open Systems Interconnection (OSI) model. ![]()
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