IPv4 Subnet Calculation Parameters
255.255.255.0 (/24)
Calculation Result (Network Details)
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Basics of IP and Subnet Masks
What is a Subnet Mask?
- Definition: A Subnet Mask is used to divide an IP address into two parts: the "Network Address" and the "Host Address".
- Role: Helps network devices determine if the destination IP is in the same local network (subnet). If so, it communicates directly; otherwise, it forwards through a gateway (e.g., a router).
Common IP Address Classes
- Class A: 1.0.0.0 to 126.255.255.255 (default mask 255.0.0.0 / 8). Used for massive networks.
- Class B: 128.0.0.0 to 191.255.255.255 (default mask 255.255.0.0 / 16). Used for medium networks.
- Class C: 192.0.0.0 to 223.255.255.255 (default mask 255.255.255.0 / 24). Used for small networks (e.g., home, office LAN).
- Class D/E: 224-239 (Multicast group), 240-255 (Reserved for research, not for general use).
Private IP Address Ranges (LAN exclusive)
- Class A Private: 10.0.0.0 - 10.255.255.255
- Class B Private: 172.16.0.0 - 172.31.255.255
- Class C Private: 192.168.0.0 - 192.168.255.255