This article explains the fundamentals of computer networks, describing how everyday devices become network nodes, the role of switches and Wi‑Fi, the importance of protocols such as Ethernet and TCP, and the differences between SOHO, LAN, MAN, and WAN architectures.
This guide explains the evolution of computer networking—from early isolated PCs to modern LAN components like cables, NICs, repeaters, hubs, bridges, switches, routers, wireless access points, firewalls, and traffic‑control devices—while offering solutions for common issues such as cable length, port limitations, speed, distance, security, and congestion across home, small‑business, campus, and data‑center environments.
This article systematically outlines the functions, OSI layer positions, and key differences of common networking hardware—including repeaters, hubs, bridges, switches, routers, and gateways—providing clear explanations and visual illustrations to help readers understand how each device processes signals and facilitates data communication within modern intelligent building networks.
This guide walks through deploying a centralized Rsyslog server on CentOS, configuring SELinux, firewall, rsyslog, Filebeat, Logstash, and Kibana to collect, process, and visualize logs from various network devices, addressing common sysadmin challenges.
