Telnet to other systems. Check Ports in Use. & more

Telnet to another system / How to Check Ports in Use, & more

telnet:  https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/telnet

How To Telnet To A Server In Linux:
https://www.systranbox.com/how-to-telnet-to-a-server-in-linux/

How To Install And Configure A Telnet Server In Linux:
https://www.systranbox.com/how-to-install-and-configure-a-telnet-server-in-linux/

Find telnet client's IP address:  
https://www.linuxquestions.org/questions/linux-server-73/find-telnet-client%27s-ip-address-non-obvious-895589/

5 fun & geeky things you can do on Telnet:
https://www.digitalcitizen.life/5-fun-geeky-things-you-can-do-telnet-client/

Network Ports:  https://ipcisco.com/lesson/network-ports/

How to Check Open TCP/IP Ports in Windows:
https://www.howtogeek.com/howto/28609/how-can-i-tell-what-is-listening-on-a-tcpip-port-in-windows/

Display all open ports on your network using PortScan for Windows:
https://www.ghacks.net/2014/12/18/display-all-open-ports-on-your-network-using-portscan-for-windows/
https://www.the-sz.com/products/portscan/

How to Check Ports in Use in Windows 10 & 11:
https://windowsloop.com/check-ports-in-use-windows-10/