further to what Stvosky posted, yes you should use your package manager to determine this. For example to see what executables are provided by the install nmap-ncat package run:
rpm -ql nmap-ncat | grep bin
Then find what other packages you could install to provide these commands. For exmaple if nmap cat provides both nmap and ncat you run the following two commands to find out what you should install to provide the same functionality if you were to remove nmap-ncat
yum provides '*/bin/nmap'
yum provides '*/bin/ncat'
Please note that issues like this are random packages from random repositories should not be mixed, and they are, they should be documented in the sysadmins notes.