Alt Ağ (Subnetting) Nedir?
Alt ağ oluşturma, bir ağı iki veya daha fazla küçük ağa bölme işlemidir. Trafik akışını iyileştirir, güvenliği artırır ve ağ yönetimini basitleştirir.
Yaygın CIDR Notasyonları
- /32: Tek IP adresi Single IP address
- /30: Noktadan noktaya bağlantı (2 kullanılabilir host) Point-to-point link (2 usable hosts)
- /24: Standart küçük ağ (254 kullanılabilir host) Standard small network (254 usable
hosts)
- /16: Büyük kurumsal ağ (65,534 kullanılabilir host) Large corporate network (65,534 usable
hosts)
- /8: Çok büyük ağ (16.7M kullanılabilir host) 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.