Method to detect whether ip and port are connectable

windows cmd

telnet

format:

telnet ip port

case:

telnet 191.1.1.1 8080

telnet cannot add http://

telnet does not support domain names

The default port for telnet is 23

telnet Connections ip and port are spaces and not colons:

If the connection is not available, it will be prompted to fail; otherwise, if cmd has a large blank and inoperable interface, the connection will be successful.

ping

format:

ping ip perhaps domain:port

case:

ping 191.1.1.1:8080

ping cannot be added with http://

ping Supports Domain Names

ping default port is 80

ping Connections ip and port are colons":"

If the connection is not available, it will be prompted for failure, otherwise it will be prompted for how many bytes to send and receive, a total of 4 rounds of send and receive.