1, the same port mapping, refers to the port that obtains the public network ip address through port conversion.
2. Refers to the mapped port. For example, if port 80 of computer A is mapped to port 80 on the router's public ip, port 80 on the router is called a mapped port.
Extended data
Classification of mappings
Port mapping is divided into dynamic and static. Dynamic port mapping: When a computer in the intranet wants to visit a website, it will send a packet to the NAT gateway, including the IP and port of the other website and the local IP and port in the header. The NAT gateway will replace the local IP and port with its own public IP and an unused port, and will record this mapping relationship so as to forward packets in the future.
Then send the data to the website, the website will respond after receiving the data, send the data to the unused port of NAT gateway, and then NAT gateway will forward the data to the computer in the intranet to realize the communication between the intranet and the public network. When the connection is closed, the NAT gateway will release the port assigned to this connection so that future connections can continue to be used.