Mis on alamvõrgu loomine (Subnetting)?
Alamvõrgu loomine on protsess, mille käigus jagatakse võrk kaheks või enamaks väiksemaks võrguks. See parandab liikluse voogu, turvalisust ja lihtsustab võrguhaldust.
Levinud CIDR-i tähistus
- /32: Üksik IP-aadress Single IP address
- /30: Punkt-punkti link (2 kasutatavat hosti) Point-to-point link (2 usable hosts)
- /24: Standardne väikevõrk (254 kasutatavat hosti) Standard small network (254 usable
hosts)
- /16: Suur ettevõttevõrk (65 534 kasutatavat hosti) Large corporate network (65,534 usable
hosts)
- /8: Väga suur võrk (16,7 miljonit kasutatavat hosti) 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.