ccna-200-301

1. Introduction to EUI-64 Imagine this: You’re deploying hundreds — or thousands — of IPv6-enabled devices in a large company or IoT environment. Manually assigning each interface its own address? ❌ No way. You need something automatic, unique, and scalable. That’s exactly what EUI-64 is designed for. 💡 What is EUI-64? EUI-64 (Extended Unique Identifier)…

1. Introduction to Speed and Duplex Imagine this: You’ve just installed a brand-new switch, connected to a server and a PC.Everything is wired correctly — but performance feels… uneven. That’s where speed and duplex settings come into play. 🚀 What Is Interface Speed? Interface speed defines how fast data travels over a network connection. Common…

1. Topology Overview 🗺️ Imagine you’re the network administrator of a mid-sized company.You’ve just received a task: separate the HR and Sales teams logically, even though their devices are connected to the same physical switch. That’s where VLANs come in. We’ll use this simple setup: VLAN Department Ports Assigned 10 HR G0/0, G0/1, G0/2 20…

1. Introduction to VLANs Imagine this: You’re the network administrator of a company. You walk into a large open-space office where all devices are connected to the same switch. Now picture this: every time one device sends a broadcast, every single device hears it—HR, Sales, even the printer. This flood of traffic is chaotic, insecure,…

1. Introduction to 802.1Q Trunking VLAN Tagging and Frame Handling When a switch processes traffic from a VLAN, it adds a VLAN tag to Ethernet frames as they traverse a trunk port. This tag ensures that devices in the same VLAN, even if connected to different switches, can communicate. Here’s what happens step by step:…

1. Purpose of Voice VLAN A Voice VLAN is designed to separate and prioritize VoIP (Voice over IP) traffic on a network. By isolating voice traffic from data traffic, it ensures high-quality audio communication, reducing latency, jitter, and packet loss. Initial Configuration Challenges Traditionally, connecting a computer and an IP phone to a switch required…

1. Introduction In the course “Need of Networking Model,” we discussed how, initially, each manufacturer (IBM, DEC, etc.) designed its own communication protocols, making it impossible to interconnect equipment from different brands. This situation led to the need to standardize network communication. Later, in the course “OSI Model,” we explored a 7-layer structure that explains…

1. Introduction The Open Systems Interconnection (OSI) Model, established by the International Organization for Standardization (ISO) in the 1980s, was created to serve as a universal reference for how different computer systems should communicate over a network. A key feature of the model is its layered approach, which divides the communication process into seven distinct…

1. The Purpose of Networking Models Humans need a common language to communicate and understand each other. For example, imagine a person who only speaks English trying to talk to someone who only speaks Chinese. Without a shared language, they simply won’t understand one another. Networking operates in the same way : without a standardized…

1. Introduction Understanding collision and broadcast domains is critical for designing efficient networks. These domains dictate how devices communicate and impact network performance. Proper management of both ensures efficient communication and prevents unnecessary congestion. 2. Collision Domain Definition A collision domain is a part of a network where data packets can collide if multiple devices…