Not neccessarily. There is a tool from Microsoft, that is installed when installing IIS, called IISReset which is located in the %windir%\system32\ folder. It can be run from the command line, and takes parameters.
Usage: iisreset [computername] /switches| /RESTART | Stop and then restart all Internet services. |
| /START | Start all Internet services. |
| /STOP | Stop all Internet services. |
| /REBOOT | Reboot the computer. |
| /REBOOTONERROR | Reboot the computer if an error occurs when starting,stopping, or restarting Internet services. |
| /NOFORCE | Do not forcefully terminate Internet services if attempting to stop them gracefully fails. |
| /TIMEOUT:val | Specify the timeout value ( in seconds ) to wait for a successful stop of Internet services. On expiration of this timeout the computer can be rebooted if the /REBOOTONERROR parameter is specified. The default value is 20s for restart, 60s for stop, and 0s for reboot. |
| /STATUS | Display the status of all Internet services. |
| /ENABLE | Enable restarting of Internet Services on the local system. |
| /DISABLE | Disable restarting of Internet Services on the local system. |