7
Peer to peer means a product, or products are being shipped by sea and loaded and unloaded at the docks or port.
firewire
The Tritton only needs your P2P application's port number and your computer's IP to enable port forwarding for P2P.
You must contact your administrator, or change the settings to open the required port.
Waffles
Serial port is by far the fastest port. It is so fast that it is used in modern computer to connect hard drive to motherboard. Current generation of serial port is SATA 6Gpbs.
Peer
Waffles
Port 25 is reserved for SMTP traffic. Hence, it is listening for email.
Ports are somewhat like doors, traffic can flow either way though them but you can set them up so that it can only flow one way. A listening port is open and waiting for something to come in. It is possible to configure things so that a port can be used to receive traffic, but not send anything out through it. It is also possible to configure things so that a port is not listening but it is open for SENDING out information. Usually when we speak of an "open port" it is open for traffic both ways.
Port 80
You wouldn't use a shell script to do this. Any program could listen on a port by connecting or binding to a socket address. There are some utility languages such as Perl that could connect to a port and listen, but the listening would also be a function of what you are listening for.