Computer Networks

A computer network is simply two or more computers connected together so they can exchange information. A small network can be as simple as two computers linked together by a single cable. This course introduces you to the hardware and software needed for a network, and explains how a small network is different from larger networks and the Internet. Most networks use hubs to connect computers together. A large network may connect thousands of computers and other devices together.Networks are often classified as local area network (LAN), wide area network (WAN), metropolitan area network (MAN), personal area network (PAN), virtual private network (VPN), campus area network (CAN), storage area network (SAN), and others, depending on their scale, scope and purpose, e.g., controller area network (CAN) usage, trust level, and access right often differ between these types of networks. LANs tend to be designed for internal use by an organization’s internal systems and employees in individual physical locations, such as a building, while WANs may connect physically separate
parts of an organization and may include connections to third parties. This ebook will fulfill the requirements of students, teachers and professionals.