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.
A proxy server listens to a request from the web browser on its port number and forwards it to the website. The website's response is received by the proxy server, then forwarded to the web browser. Identification. Some port numbers are popular. Port 3128 is the default port for the Squid proxy server. Port 8080 is the default port for the Microsoft ISA proxy server. Usage. Once the proxy server administrator configures a port number for the proxy server, the web browser is configured to use the proxy server's port number and host name to browse the web.