¿Qué es Subnetting?
Subnetting es el proceso de dividir una red en dos o más redes más pequeñas. Mejora el flujo de tráfico, la seguridad y simplifica la gestión de la red.
Notación CIDR Común
- /32: Dirección IP única Single IP address
- /30: Enlace punto a punto (2 hosts utilizables) Point-to-point link (2 usable hosts)
- /24: Red pequeña estándar (254 hosts utilizables) Standard small network (254 usable
hosts)
- /16: Gran red corporativa (65,534 hosts utilizables) Large corporate network (65,534 usable
hosts)
- /8: Red muy grande (16.7M hosts utilizables) Very large network (16.7M usable hosts)
Computes network addresses, broadcast addresses, usable host ranges, and CIDR notation for IP subnets. Essential for network planning.
Key Facts
- /24 subnet has 254 usable IPs
- Private ranges: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16
- Subnetting introduced in 1985 (RFC 950)
- CIDR replaced classful networking in 1993
Frequently Asked Questions
What is a subnet?
A logical division of an IP network into smaller segments for security, performance, and efficient IP usage.
What does /24 mean?
First 24 bits are network portion, 8 bits for hosts = 254 usable addresses.
How to calculate hosts?
Formula: 2^(32-prefix) - 2. For /24: 2^8 - 2 = 254 usable hosts.
Public vs private IP ranges?
Private (10.x, 172.16-31.x, 192.168.x) for internal use. Public IPs are globally unique for internet.