Without Computer Networks, nothing in this world could from Facebook to bank transactions, everything is based on computers and network. This book will answer the questions; what is networking? How it is done? What are protocols supporting the networks?;How is Layering followed? Comprising relevant examples and results obtained through testing and offering a quiz in every chapter to sharpen the understanding of readers.Table of Contentso Prefaceo Introduction to Networkingo OSI Layer and Network Componentso Physical Layero Data Link Layero Internet Protocolo Transport Layero Application An In-depth Analysiso Network Securityo Network Simulationo Case Studyo Index.