IP Address, DNS aur Ports Kya Hote Hain? Complete Guide in Hindi (Day 7)
🌐 Day 7: IP Address, DNS & Ports
Agar aap Bug Hunting ya Cyber Security seekh rahe ho, to networking ka basic samajhna bahut zaruri hai.
Aaj hum samjhenge:
👉 IP Address kya hota hai?
👉 DNS kya karta hai?
👉 Ports kya hote hain?
👉 Ye sab internet me kaise kaam karte hain?
Chaliye simple language me samjhte hain.
🔢 IP Address Kya Hota Hai?
IP ka full form hai:
👉 Internet Protocol
IP Address ek unique number hota hai jo har device ko internet par identify karta hai.
Example:
192.168.1.1
Ya phir:
142.250.183.14
Har:
Mobile
Laptop
Server
ka apna IP address hota hai.
Simple words me:
👉 IP Address = Internet par ghar ka exact number
📦 IP Address Ke Types
1️⃣ IPv4
Format:192.168.0.1
Ye 32-bit hota hai aur limited addresses provide karta hai.
2️⃣ IPv6
Format:2400:cb00:2048:1::c629:d7a2
Ye 128-bit hota hai aur zyada addresses provide karta hai.
Internet future me mostly IPv6 use karega.
📖 DNS Kya Hota Hai?
DNS ka full form hai:
👉 Domain Name System
DNS ka kaam hota hai:
✔ Domain name ko IP address me convert karna
Example:
google.com → 142.250.xxx.xxx
Computer domain name nahi samajhta,
wo sirf IP address samajhta hai.
Isliye DNS ko internet ka “Phonebook” kaha jata hai.
🔁 DNS Ka Process
1️⃣ User domain type karta hai
2️⃣ DNS server IP address find karta hai
3️⃣ Browser server se connect karta hai
4️⃣ Website load ho jati hai
Ye process milliseconds me hota hai.
🚪 Ports Kya Hote Hain?
Port ek communication endpoint hota hai.
IP address batata hai:
👉 Kaunsa device
Port batata hai:
👉 Kaunsi service
Example:
Port 80 → HTTP
Port 443 → HTTPS
Port 21 → FTP
Port 22 → SSH
Agar IP ghar hai,
to Port us ghar ka specific room hai.
⚙ IP + Port Example
Agar aap likhte ho:
192.168.1.1:80
Iska matlab:
IP = 192.168.1.1
Port = 80 (HTTP service)
🔐 Bug Hunting Me Ye Kyun Important Hai?
Bug Hunters check karte hain:
✔ Kaunse ports open hain
✔ Kya unnecessary services running hain
✔ Kya DNS misconfigured hai
✔ Kya IP expose ho raha hai
Open ports se vulnerabilities mil sakti hain.
Example:
Open database port
Weak SSH configuration
DNS misconfiguration
Networking samajhna Bug Hunting ki backbone hai 🔥
📊 Quick Comparison
| Component | Kaam |
|---|---|
| IP Address | Device identify karta hai |
| DNS | Domain ko IP me convert karta hai |
| Port | Service identify karta hai |
📝 Exam Definition
IP Address ek unique number hota hai jo device ko internet par identify karta hai, DNS domain name ko IP me convert karta hai aur Ports specific services ko identify karte hain.
🚀 Conclusion
Aaj aapne networking ke 3 important pillars samjhe:
✔ IP Address
✔ DNS
✔ Ports
Ab aap Bug Hunting ke liye strong base bana chuke ho 🔥