Since nonessential components are shut down, some energy is saved, but the awake RAM allows the PC to come to life much faster than it would if it were turned off or in hibernation mode. For more details, see How to Change Sleep State Settings in Windows 7.
The major difference between inbound and outbound is the call flow direction. In inbound, the call is done by the customer for services such as technical support, data entry, messaging, order taking, appointment and scheduling and more.
If we need to modify the incoming request uri or request headers before the request is handed over to the execution engine in IIS we can make use of URL Rewrite inbound rules. Over here we will be discussing the use of URL rewrite inbound rules independent of ARR.