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<p>Created page with &quot;=== 7.1.1 OSI Model (7 Layers) === The &#039;&#039;&#039;OSI Model&#039;&#039;&#039; (which stands for Open Systems Interconnection) is a way to understand how different parts of a network work together. It breaks down the process of sending and receiving data into 7 different layers, starting from what you see on your screen all the way down to the physical wires. Each layer has a specific job, and they work together to make sure information gets where it needs to go. Imagine sending a letter: # &#039;...&quot;</p> <p><b>New page</b></p><div>=== 7.1.1 OSI Model (7 Layers) ===<br /> The &#039;&#039;&#039;OSI Model&#039;&#039;&#039; (which stands for Open Systems Interconnection) is a way to understand how different parts of a network work together. It breaks down the process of sending and receiving data into 7 different layers, starting from what you see on your screen all the way down to the physical wires. Each layer has a specific job, and they work together to make sure information gets where it needs to go.<br /> <br /> Imagine sending a letter:<br /> <br /> # &#039;&#039;&#039;Application Layer:&#039;&#039;&#039; You write the letter (your message, like a video game sending player data).<br /> # &#039;&#039;&#039;Presentation Layer:&#039;&#039;&#039; You make sure the letter is in a language the receiver understands (like converting data formats).<br /> # &#039;&#039;&#039;Session Layer:&#039;&#039;&#039; You decide to start a conversation with someone and keep it open while you&#039;re talking.<br /> # &#039;&#039;&#039;Transport Layer:&#039;&#039;&#039; You decide if you want to make sure the letter arrives perfectly (like registered mail for important data) or if it&#039;s okay if a bit gets lost (like streaming video).<br /> # &#039;&#039;&#039;Network Layer:&#039;&#039;&#039; You decide the best route for the letter to take across different cities (like figuring out the path for data across the Internet).<br /> # &#039;&#039;&#039;Data Link Layer:&#039;&#039;&#039; You put the letter in an envelope, write the street address, and make sure it&#039;s ready for the local mail delivery.<br /> # &#039;&#039;&#039;Physical Layer:&#039;&#039;&#039; You put the letter in the mailbox for the mail carrier to pick up and deliver (this is the actual wires, cables, or Wi-Fi signals).<br /> <br /> It&#039;s a very detailed model, mostly used for understanding and designing complex networks.<br /> <br /> &#039;&#039;&#039;Bibliography:&#039;&#039;&#039;<br /> <br /> * &#039;&#039;&#039;What is the OSI Model?&#039;&#039;&#039; (2024, May 15). &#039;&#039;Cloudflare Learning Center&#039;&#039;. https://www.cloudflare.com/learning/ddos/glossary/open-systems-interconnection-model-osi/<br /> * &#039;&#039;&#039;OSI Model.&#039;&#039;&#039; (n.d.). &#039;&#039;Imperva.com&#039;&#039;. https://www.imperva.com/learn/application-security/osi-model/</div>

Mr. Goldstein