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.
Port 8080 is an alternative to the port 80 used by http and web services. History: The Internet was largely born on UNIX-based systems and servers. UNIX enforces the notion of the first 1023 "privileged ports" which can only be opened by services running with so-called "root", or administrative, privileges. Historically, this meant that only authorized system administrators were able to establish and operate a web server on port 80 since this was within the first 1023-port privileged region. Therefore, when non-administrators wished to run their own web servers on machines which might already have a server running on port 80, or when they were not authorized to run services below port 1024, port 8080 was often chosen as a convenient place to host a secondary or alternate web server.
If I understand the question aright; different port numbers are used to identify different protocols. Port numbers between 1 and 1023 are well-known numbers and standards define which protocol uses which. FTP uses port number 21, HTTP uses port 80.
port 80
port 80 or 27005
Port 80
A Web server - or most other servers - will HAVE TO reserve a port number, to function correctly. For a Web server, this is usually port 80, but this can be changed to any other port.A Web server - or most other servers - will HAVE TO reserve a port number, to function correctly. For a Web server, this is usually port 80, but this can be changed to any other port.A Web server - or most other servers - will HAVE TO reserve a port number, to function correctly. For a Web server, this is usually port 80, but this can be changed to any other port.A Web server - or most other servers - will HAVE TO reserve a port number, to function correctly. For a Web server, this is usually port 80, but this can be changed to any other port.
Port 80 and port 44 are located inside the server and mainly Port 80 is used by server transactions of HTML pages to the web browser. thanks
port 80
Port 80
Port 80
The firewall typically is configured to allow inbound connections on a specific port to a particular IP address on the network (the server). This usually means that port 80 and/or 443 will be configured to allow access to the server from the Internet.
Port 80 is the default web server port and IIS would use Port 80 unless configured to use a different port.
1) On the server side, to distinguish different applications. Thus, if the server (the server computer) receives a data packet for port 80, it will usually be forwarded to the Web server; but if it receives a data packet for port 21, it will be forwared to the FTP server. 2) On the client side, to distinguish different conversations. For example, if the browser accesses two files from the same Web server at the same time, the first file might be assigned, for example, port 1024 (for the sending port; the receiving port will be 80), while the next file might be assigned port 1025. When a data packet is sent back for port 1025, in this example the browser knows that it is for the second file.
A typical rule that allows port 80 traffic through a firewall is one that permits inbound TCP connections on port 80, which is the standard port for HTTP traffic. This rule usually specifies the source and destination IP addresses or networks and allows traffic from any source to the designated server's IP on port 80. Additionally, the action for this rule would be set to "allow" or "accept." This configuration enables web traffic to reach the server hosting the website.
80
Port 80 is used only for the initial connection. As soon as a host connects, the server hands off the session to a free port and the session is established using that port. This keeps port 80 free for new incoming requests.
port 21 FTP port 25 E-mail SMTP port 80 web server HTTP port 110 E-mail POP3