What is a Network? 🧩

A network is a group of interconnected devices that share data using protocols 📡

👉 Network = Devices connected 🔗

Devices in Network (Nodes) 🖥️📱

Computer

Laptop

Mobile

Printer

Server

Router

Switch

Smart TV

Home Network Example 🏠

Mobile + Laptop + TV + Router → LAN 📶

Office Network Example 🏢

Computers + Printer + Server + Firewall → Organizational Network

What is Networking? 🔄

Networking is the process of connecting devices and enabling communication.

👉 Network = Structure 🧱
👉 Networking = Process ⚙️

Data Communication Flow 📦

1️⃣ Sender creates data
2️⃣ Data converted into packets
3️⃣ Travels through devices
4️⃣ Receiver reassembles

What is a protocol? 📜

Rules defining communication between devices 🚦

Examples:
HTTP 🌐
HTTPS 🔐
FTP 📁
SMTP 📧
DNS 🧭

What is Port Number? 🔢

Identifies service on server.

Server IP = Building 🏢
Port = Flat Number 🚪

Common Ports:
HTTP — 80
HTTPS — 443
FTP — 21
SMTP — 25
DNS — 53

Benefits of Networking 🌟

Resource sharing 🖨️

Communication 💬

Central storage 🗄️

Remote access 🌍

Scalability 📈

Cost saving 💰

Interview Answers 🎓

Network → interconnected devices sharing data
Networking → process of connecting devices