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Third-level IP address

The meaning of the third-level IP address:

The third-level IP address: ┃------network address-------┃--subnet number-- ┃-Host Address-┃ (Through Subnetting)

Subnetting is a network of two-level IP addresses based on classes. It borrows several host bits in the IP address to act as subnet addresses. The original network is divided into smaller subnets to form a three-level IP address network.

Example: 192.168.1.0/25

ip range: 192.168.1.0-192168.1.127 Subnet: 255.255.255.128

ip range: 192.168.1.128 -192168.1.255 Subnet: 255.255.255.128