Enter IP地址 and prefix length to 开始 calculation
What is CIDR?
CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses and performing IP routing. It uses prefix length to represent the 大小 of the network portion, replacing traditional A, B, C class network divisions.
子网掩码
子网掩码 is used to distinguish the network portion and host portion in an IP地址. The shorter the prefix length, the larger the network and more hosts; the longer the prefix length, the smaller the network and fewer hosts.
子网划分
子网划分 is the process of dividing a large network into multiple smaller sub-networks, which can improve network security, reduce broadcast domains, and optimize network performance. Consider actual requirements when dividing subnets.
Private IP Addresses
Private IP addresses include: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16. These addresses can only be used within internal networks and cannot be directly routed on the Internet.