Networking is one of the foundational pillars of DevOps and system administration. Today, I dove into the basics of computer networks—how machines communicate and the components involved.

💡 What is Networking?

Networking is the process of connecting computers, servers, and other devices to share data and resources. It enables communication between different systems across local or global distances.

🌐 What is a Computer Network?

A computer network is a group of interconnected devices (like computers, servers, routers, switches, etc.) that exchange data using predefined protocols.

🧩 Key Components of a Computer Network:

Component	Description
Node	Any device (computer, printer, switch, router) on a network.
NIC	Network Interface Card – hardware that connects a device to the network.
Router	Forwards data between networks (LAN → Internet).
Switch	Connects devices in a LAN and forwards data to the correct device.
Hub	Basic device that broadcasts data to all connected devices. (Rarely used)
Access Point	Connects wireless devices to a wired network.
Modem	Converts digital data to signals over telephone/cable lines (Internet).
Firewall	Secures the network by filtering traffic based on rules.
Cables	Physical medium (Ethernet, fiber optics) used for transmission.
Protocols	Set of rules for communication (TCP/IP, HTTP, FTP, etc.)

🚀 Why This Matters in DevOps?

DevOps Engineers often:

Configure private networks between VMs
Use port forwarding, firewalls, and load balancers
Work with cloud networking, containers, DNS, and VPNs
Understanding these basics sets the stage for automation, deployment, and security.

🧠 Key Terms to Remember:

LAN / WAN / MAN
IP Address
MAC Address
DNS / DHCP
Ports & Protocols

📅 Coming Up Tomorrow :
Diving into OSI Model and how networking works behind the scenes!

Day 30: Understanding Networking and Computer Network Components