All channel numbers with a D suffix indicate a repeater output frequency used in simplex mode (for example, LLAW1D is simplex on the output frequency of LLAW1).Please refer to the wiki article for notes regarding the use of CTCSS tones on Low Band, VHF, UHF, and 800 Public Safety Common frequencies.nteroperability. VTAC17/17D are the same as Marine Channel 25 and may only be used in areas at least 100 miles from a navigable waterway, and by ground stations only (no aircraft use permitted).
Port Numbers in URLs. Port numbers can also be specified using URL. For example port 80 is by default for HTTP. when you type a dot com in your browser the browser sends request in the form of http://www.domain.com:80/ to the server which responds and transfers data.
1 IANA has specified that Port 80 is used for HTTP. 2  This means that an incoming packet that says port number 80 must be a request intended for a web server. 3  Port forwarding on your router allows you to enter a port number (or possibly a range or combination of numbers, depending on the router), and an IP address. Port forwarding on your router allows you to enter a port number (or possibly a range or combination of numbers, depending on the router), and an IP address.