LibraTool logoLibraTool
🌐
🎓

Subnetting Practice for IT Students

Check your subnetting homework and CCNA practice problems instantly.

ලොගිනය අවශ්‍ය නැත
/
/0/8/16/24/32
254
Usable hosts
256
Total addresses
Network address192.168.1.0/24
Usable host range192.168.1.1 – 192.168.1.254
Broadcast address192.168.1.255
Subnet mask255.255.255.0
Wildcard mask0.0.0.255
Mask (binary)11111111.11111111.11111111.00000000
IP classC
Address typePrivate (RFC 1918)

IPv4 subnetting reference. /31 and /32 are handled per RFC 3021 (point-to-point and single-host). All math runs locally in your browser.

IT Students tips

🎓

Studying for CCNA / Network+? Work the problem by hand, then verify network, broadcast, and host range here.

💡

The binary mask and wildcard mask help connect the dot-decimal notation to what's happening bit-by-bit.

🎯

Practice the /25, /26, /27, /28 boundaries — these are the most common exam questions.

එය ක්‍රියා කරන්නේ කෙසේද

1
ඇතුළු කරන්න
Enter your data into the tool above. Everything stays local to your browser.
2
සකස් කරන්න
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
බාගත කරන්න
Get your result instantly. Nothing is stored after you leave the page — complete privacy.

අපගේ දේ ඇයි භාවිතා කරන්නේ?

✓සම්පූර්ණයෙන්ම නොමිලේ — කිසිදා සැඟවුණු පිරිවැයක් නැත
✓ගිණුමක්, විද්‍යුත් තැපෑලක්, හෝ ලොගිනයක් අවශ්‍ය නැත
✓ගොනු කිසිදා ඔබේ උපාංගය හරහා නොයන්නේය
✓කිසිදු ගොනු ප්‍රමාණ සීමාවක් නැත
✓ඕනෑම ප්‍රතිදානයක ජල සලකුණු නැත

Also check out…

🖧

Subnet Planning for Network Admins

Plan IP allocation, calculate usable hosts, and si

🏠

Home Lab & Self-Hosting Subnets

Plan IP ranges for your home network, VLANs, Docke

☁️

Plan Cloud VPC CIDR Blocks

Size AWS/GCP/Azure VPC and subnet CIDR ranges befo

🛡️

CIDR Ranges for Firewall Rules

Convert IP ranges to CIDR notation for firewall al

නිතර අසන ප්‍රශ්න

Back to Subnet / CIDR Calculator