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. |
