Only one. If there was more than one process listening on the same port, then there would be no way of knowing which process incoming data was intended for. -DJ Craig
A computer port is a connection point between a computer and an internal or external device. Its purpose is to identify various applications or processes that are executing on a single computer.
No, Whitney Port is not single.
Port 23
32239
By default it listens on SMTP port 25
Cups uses port 631 by default
Edit the ports.conf file and change the line listen 80 to listen 81 which is, all in all, remarkably straightforward.
port 25
A computer port is a connection point between a computer and an internal or external device. Its purpose is to identify various applications or processes that are executing on a single computer.
The ION VCR uses a single USB port, located on the back of the unit.
TCP 3268
Conventionally, an HTTP server listens on port 80. Regardless of the brand of web server that you are running, the server will typically listen for HTTP traffic on port 80 and HTTPS traffic on port 443.