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In a switched network, devices are often grouped based on departments, functions, or security requirements. A VLAN (Virtual Local Area Network) allows a network administrator to logically divide a physical network into multiple separate broadcast domains. This topic covers the configuration and verification of VLANs across multiple switches What is a VLAN? A VLAN (Virtual … Read more

Introduction to Switching Concepts Switching is a fundamental networking process that helps to transfer data efficiently among the devices within a Local Area Network (LAN). An Ethernet switch plays a very important role in switching operation at the Data Link Layer (Layer 2) of the OSI model A switch uses MAC (Media Access Control) addresses … Read more

Wireless networking is built on a set of foundational principles that allow data to travel invisibly through the air. Instead of using physical copper cables or fiber optics, wireless networks rely on radio frequency (RF) signals to communicate. Here is an overview of the core principles that govern how wireless networks operate: 1. The Electromagnetic … Read more

Introduction Virtualization has transformed modern IT infrastructure by enabling organizations to maximize hardware utilization, improve scalability, reduce operational costs, and simplify management. Instead of dedicating physical hardware to a single application or service, virtualization allows multiple isolated environments to share the same underlying resources. Today, virtualization technologies are widely used in data centers, cloud computing … Read more

Introduction In modern computer networks, every device must have correct Internet Protocol (IP) settings to communicate with other devices and access network resources. Whether troubleshooting connectivity problems, verifying DHCP assignments, or validating network configurations, network administrators frequently need to examine a client’s IP parameters. IP parameters include information such as: Every operating system provides tools … Read more

Introduction The rapid growth of internet-connected devices has made the limitations of IPv4 increasingly apparent. To address the shortage of available IP addresses and improve network efficiency, Internet Protocol Version 6 (IPv6) was developed. IPv6 uses 128-bit addresses, providing approximately 340 undecillion unique addresses, which is enough to support the continued expansion of the Internet, … Read more

Introduction to IPv6 Addresses IPv6 (Internet Protocol version 6) is the latest version of the Internet Protocol used to identify and communicate with devices over a network. To ensure proper communication in an IPv6 network, devices must be assigned correct IPv6 addresses along with the appropriate prefix length, which defines the network portion of the … Read more

Introduction As computer networks grow, managing IP addresses efficiently becomes increasingly important. IPv4 subnetting is a fundamental networking technique that helps network administrators divide large networks into smaller, more manageable segments called subnets. Whether you’re preparing for networking certifications, managing enterprise networks, or simply learning how the Internet works, understanding subnetting is an essential skill. … Read more