Ce este Subnetting?
Subnetting este procesul de împărțire a unei rețele în două sau mai multe rețele mai mici. Îmbunătățește fluxul de trafic, securitatea și simplifică gestionarea rețelei.
Notație CIDR Comună
- /32: O singură adresă IP Single IP address
- /30: Legătură punct-la-punct (2 host-uri utilizabile) Point-to-point link (2 usable hosts)
- /24: Rețea mică standard (254 host-uri utilizabile) Standard small network (254 usable
hosts)
- /16: Rețea corporativă mare (65.534 host-uri utilizabile) Large corporate network (65,534 usable
hosts)
- /8: Rețea foarte mare (16.7M host-uri utilizabile) 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.