Loopback is a special network interface that allows a device to communicate with itself. It is mainly used for testing, debugging, and troubleshooting network applications.
Key Points:
✅ Loopback IP: 127.0.0.1 (IPv4) or ::1 (IPv6)
✅ Also Known As: localhost
✅ Purpose:
- Test network services without an external connection
- Check if TCP/IP is working correctly
- Debug servers and applications
Loopback in Local Development 🚀
Loopback (127.0.0.1 or localhost) is widely used for local development because it allows developers to run and test applications on their own machine without needing an internet connection.
How is it Used?
✅ Running Local Servers: Developers use loopback to run local web servers like:
- Node.js (
localhost:3000) - PHP (
localhost:8000) - Python (
localhost:5000)
✅ Database Testing: Connect to databases locally, e.g., MySQL, PostgreSQL, MongoDB
✅ API Development: Test APIs onlocalhostbefore deploying them
