Job Recruitment Website - Job information - What does the recruitment port mean? Please explain!

What does the recruitment port mean? Please explain!

If the IP address is compared to a house, the port is the door of the house. A real house has only a few doors, but an IP address can have as many as 65536 ports (2 16)! Ports are marked with port numbers, which are only integers between 0 and 65535 (2 16- 1).