As title has an IP I don't know his open ports, in addition to ping, what method can know the IP is online status, is the host is using.

CodePudding user response:

Can only use a lot of port connection, test
Network sniffer tools, such as nmap

CodePudding user response:

Oh, that's too bad, and the basic line of GG,

CodePudding user response:

IP to identify a computer, ports, identify an application on the computer
Normal access typically require IP + port, to access to a specific service
Ping should only be IP recognition, don't need to identify the port, need to directly support protocol stack, therefore, ping should be the most directly determine whether a computer can reach method,