Is there any Netcat like application available in Android OS by default, like most of the Linux systems? In most Linux systems Netcat is installed by default. Is any Netcat-like application installed by default in Android OS?
Not natively. You first need to install a Terminal application like "Termux" https://play.google.com/store/apps/details?id=com.termux&amp;hl=en then "Busybox" https://play.google.com/store/apps/details?id=stericson.busybox&amp;hl=en. Here is some info on all of the tools included in the Busybox package https://www.busybox.net/downloads/BusyBox.html

There are also several other Netcat style applications available from the Google Play store - https://play.google.com/store/search?q=netcat&amp;c=apps&amp;hl=en