msDos tool box

tnsping
- The tnsping utility is used to determine whether or not an Oracle service can be successfully reached. See more at OracleUtilities

netstat
- The netstat command is used to display the TCP/IP network protocol statistics and information. (more)

nslookup
- MS-DOS utility that enables a user to look up an IP address of a domain or host on a network. (more)

More msDos commands can be found at computerhope