Private (Local) IP ranges:
10.0.0.0/8
172.16.0.0/12 —172.35.255.255
192.168.0.0/16
特殊用途(也算局域网, 不会,也不应该向上层转发)
Special-purpose IP ranges:
0.0.0.0/8: Used for “this network”, i.e., the network the host is on.
100.64.0.0/10: Shared Address Space, for use in Carrier Grade NAT scenarios.
127.0.0.0/8: Reserved for loopback addresses to the local host.
169.254.0.0/16: Used for link-local addresses between two hosts on a single link when no IP address is otherwise specified, such as on a network that does not have a DHCP server.
192.0.0.0/24: Reserved but undefined. (IANA Special-Purpose IP Address Registry)
192.0.2.0/24, 198.51.100.0/24, and 203.0.113.0/24: Used for documentation and example code.
192.88.99.0/24: Used for 6to4 relay anycast.
198.18.0.0/15: Used for network interconnect device benchmark testing.
224.0.0.0/4: Reserved for multicast addresses. 根据multicast 多播规则转发
240.0.0.0/4: Reserved for future use.
255.255.255.255/32: Reserved for network broadcast.