Networking Fundamentals · lesson 6 of 17 · 25 min
Subnetting practice Subnetting divides a larger network into smaller sub-networks. This improves security (isolate segments), performance (reduce broadcast domains), and manageability.
- Worked example
- You are given
192.168.10.0/24
and need 4 equal subnets. You need to borrow 2 bits from the host portion (2^2 = 4 subnets). New prefix: /26.
- Subnet 1: 192.168.10.0/26 — hosts .1–.62, broadcast .63
- Subnet 2: 192.168.10.64/26 — hosts .65–.126, broadcast .127
- Subnet 3: 192.168.10.128/26 — hosts .129–.190, broadcast .191
- Subnet 4: 192.168.10.192/26 — hosts .193–.254, broadcast .255
Subnet increment = 256 − subnet mask octet. For /26: mask = 255.255.255.192, increment = 256 − 192 = 64. Each subnet starts 64 addresses after the previous one. Tech Camp for Kids Learning Terminal
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