Loopback
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What is Loopback?
A loopback is a mechanism where network traffic is routed back to the originating device. It's essentially a shortcut for a device to talk to itself over a network. This is achieved using a special IP address (typically 127.0.0.1 for IPv4 or ::1 for IPv6) and a designated network interface (the loopback interface). The data never actually leaves the host, instead being internally redirected.
Free resources to learn Loopback
More in stage 3: Networking Knowledge
- Networking Knowledge
- Basics of Subnetting
- Public vs Private IP Addresses
- VMWare
- VirtualBox
- esxi
- proxmox
- localhost
- CIDR
- subnet mask
- default gateway
- Installation and Configuration
- Different Versions and Differences
- Navigating using GUI and CLI
- Understand Permissions
- Installing Software and Applications
- Performing CRUD on Files
- Troubleshooting
- Common Commands
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- VLAN
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- ipconfig
- ping
- dig
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- nmap
- tcpdump
- arp
- tracert
- nslookup
- iptables
- Packet Sniffers
- Port Scanners
- Protocol Analyzers
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- NTP
- IPAM
Loopback: common questions
Can I learn Loopback in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Loopback in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Loopback tutorial for beginners?
It is lesson 46 of 301 in the free Cyber Security roadmap, in stage 3, Networking Knowledge. If you are new to Cyber Security, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.