CIDR
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What is CIDR?
CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses and routing Internet Protocol packets. It replaces the older classful network addressing scheme. CIDR uses variable-length subnet masking (VLSM) to create subnets of different sizes, offering greater flexibility in address allocation and reducing address wastage compared to the rigid class-based system. It's represented using an IP address followed by a slash and a number (e.g., 192.168.1.0/24), where the number indicates the number of bits used for the network prefix.
Free resources to learn CIDR
- ArticleWhat is CIDR?
- VideoWhat is Network CIDR Notation?
More in stage 3: Networking Knowledge
- Networking Knowledge
- Basics of Subnetting
- Public vs Private IP Addresses
- VMWare
- VirtualBox
- esxi
- proxmox
- localhost
- loopback
- 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
- Hypervisor
- GuestOS
- HostOS
- VM
- VLAN
- DMZ
- ARP
- VM
- DHCP
- DNS
- NAT
- IP
- Router
- Switch
- VPN
- MAN
- LAN
- WAN
- WLAN
- ipconfig
- ping
- dig
- netstat
- route
- nmap
- tcpdump
- arp
- tracert
- nslookup
- iptables
- Packet Sniffers
- Port Scanners
- Protocol Analyzers
- DHCP
- DNS
- NTP
- IPAM
CIDR: common questions
Can I learn CIDR 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 CIDR 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 CIDR tutorial for beginners?
It is lesson 47 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.