A /24 gives 254 usable hosts, a /25 gives 126, a /26 gives 62 — each bit halves the 可用 addresses?

A /24 gives 254 usable hosts, a /25 gives 126, a /26 gives 62 — each bit halves the 可用 addresses.

VLSM 至关重要 for efficient IP allocation — assign subnet sizes based on actual host needs instead of wasting addresses?

VLSM 至关重要 for efficient IP allocation — assign subnet sizes based on actual host needs instead of wasting addresses.

The wildcard mask is the inverse of the subnet mask — you need it for ACLs in Cisco routers.

Calculate IP subnets, CIDR ranges, usable hosts, and 拆分 networks with VLSM — the ultimate network planning tool

Calculate IP subnets, CIDR ranges, usable hosts, and split networks with VLSM — the ultimate network planning tool, 在浏览器中.

1Enter a CIDR notation (e.g., 192.168.1.0/24) in 输入字段.
2查看subnet information: network address, broadcast, first/last host, subnet mask, wildcard mask, and usable host count。
3使用Split Network tab来divide the subnet into smaller equal-sized subnets。
4使用VLSM tab来allocate subnets based on different host requirements。
5审查IP class and type (private/public) information。

A /24 gives 254 usable hosts, a /25 gives 126, a /26 gives 62 — each bit halves the 可用 addresses.
VLSM 至关重要 for efficient IP allocation — assign subnet sizes based on actual host needs instead of wasting addresses.
The wildcard mask is the inverse of the subnet mask — you need it for ACLs in Cisco routers.

免费：subnet info only。Starter+：network splitting and VLSM。