Claviro

Core Networking

IP Addressing + Subnetting

IP Addressing + Subnetting

Cover IPv4, IPv6, CIDR, subnet masks, host ranges, and practical subnet design.

Intermediate Level

Learn addressing and subnetting deeply to design efficient, secure, scalable networks.

Click the numbered markers on each diagram to explore the concept step by step.

Why This Matters

Subnetting is core for scalability, segmentation, and policy control.

Confusion Busters

Common confusion: /24 vs /25 meaning

Fix: More prefix bits means fewer host bits and smaller subnet size.

Common confusion: Public vs private

Fix: Private ranges are not internet-routable without translation (NAT).

IPv4 and IPv6

  • ▸IPv4 uses 32-bit addresses, IPv6 uses 128-bit addresses.
  • ▸Public/private ranges and addressing plans affect exposure and routing.

IP Addressing

IPv4

192.168.1.100 (32-bit)

IPv6

2001:0db8::1 (128-bit)

Private → NAT → Public

10.0.0.5 → NAT → 203.0.113.42

Subnetting

  • ▸Use CIDR notation for flexible network partitioning.
  • ▸Derive network ID, host range, and broadcast quickly.
  • ▸Segment by department for control and security boundaries.

Subnetting /24 into /26

192.168.1.0/24
→Split→

Finance 192.168.1.0/26

HR 192.168.1.64/26

Eng 192.168.1.128/26

Sec 192.168.1.192/26