Port 80 is open to HTTP (Hypertext Transfer Protocol), which is the most commonly used protocol for surfing the Internet and is mainly used for transmitting information on the World Wide Web. You can access the website by adding ":80" to the HTTP address (commonly known as "URL"). Because the default port number of the web browsing service is 80, you only need to enter the URL instead of ":80".

To view the ports in Windows2000/XP/Server2003, you can use the NETSTAT command:

"start" > "run" > "cmd" to open the command prompt window. Type "NETSTAT -a -n" at the command prompt, and then press Enter to view the port number and status of TCP and UDP connections displayed in digital form.

Command format: netstat-a-e-n-o-s

-a shows all active TCP connections and TCP and UDP ports that the computer listens to.

-e indicates the number of bytes and packets sent and received by Ethernet.

-n indicates that only the addresses and port numbers of all active TCP connections are displayed in digital form.

-o displays the active TCP connections, including the process ID(PID) of each connection.

-s indicates that statistics of various connections, including port numbers, are displayed by protocol.