Wat is Subnetting?
Subnetting is het proces van het verdelen van een netwerk in twee of meer kleinere netwerken. Het verbetert de verkeersstroom, beveiliging en vereenvoudigt netwerkbeheer.
Veelvoorkomende CIDR-notatie
- /32: Enkel IP-adres Single IP address
- /30: Point-to-point link (2 bruikbare hosts) Point-to-point link (2 usable hosts)
- /24: Standaard klein netwerk (254 bruikbare hosts) Standard small network (254 usable
hosts)
- /16: Groot bedrijfsnetwerk (65.534 bruikbare hosts) Large corporate network (65,534 usable
hosts)
- /8: Zeer groot netwerk (16,7M bruikbare hosts) 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.