The first prompt ask for terminal type. The terminal type refers to the type of terminal the host is expecting you to be. Most UNIX hosts support vt220 and this is a good choice if you are unsure. However, certain applications may also expect you to be using a particular terminal type and will issue various escape sequences in anticipation of your session handling it correctly. If things do not look correct on the screen, or the screen does not clear as it should, it is probably the terminal type.
You then see a Communications Settings dialog box. This is asking you how you want to connect to the host computer. Choose one of the circles down the left side, and set the parameters next to it. If you are connecting over TCP/IP, then a host name is asked for. The host name is either the IP address of the host you wish to connect to, i.e. 213.213.213.232, or it is the actual name, i.e. library.linfield.edu. If you need to specify a non-standard port number, follow the name or IP address with a colon (":") and then the port number.