Networks connect devices to enable communication and resource sharing, forming the backbone of modern technology. They include local area networks (LANs), wide area networks (WANs), and wireless networks. Devices such as routers, switches, firewalls, and access points manage and secure data flow. Servers host resources, while end-user devices like computers, smartphones, and tablets access them. IoT devices (e.g., smart sensors and cameras) further expand network functionality. Network efficiency relies on robust configurations, protocols (e.g., TCP/IP), and security measures like encryption and firewalls. Together, networks and devices enable seamless collaboration, data exchange, and connectivity across local and global scales.