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TCP/IP check 

TCP/IP is an industry-standard suite of protocols designed for large internet networks spanning wide area network (WAN) links. TCP/IP was developed in 1969 by the U.S. Department of Defense Advanced Research Projects Agency (DARPA), the result of a resource-sharing experiment called Advanced Research Projects Agency Network (ARPANET). The purpose of TCP/IP was to provide high-speed communication network links. Since 1969, ARPANET has grown into a worldwide community of networks known as the Internet.
Advanced Network Monitor can check LAN or WAN servers by monitoring a specific TCP/IP port. You need to specify the following parameters in the Check properties box:
  • Server address: Enter a server name in this field. It may be a domain name, URL or IP address. If you enter an IP address Advanced Network Monitor will try to resolve it.
  • Server Port: Please enter a server port number in the field. You can choose one of the following standard ports in the drop-down list: POP3, SMTP, IMAP, HTTP, FTP, NNTP, Telnet, DHCP, Socks or enter any number.
     
    Advanced Network Monitor will try to connect to the server you specified. If the connection is refused by the server, the server will be marked as 'Error'.