In simple terms, DHCP determines if your IP is static or dynamic and the length of time an IP address is assigned. Dynamic Host Configuration Protocol is controlled by a DHCP server. Your router can be a DHCP server...and if you're on a home network, it most likely serves this purpose.
Researchers report that the average adolescent needs eight and a half to nine and a half hours of sleep each night. But in a poll taken in 2006 by the National Sleep Foundation, less than 20 percent reported getting that much rest on school nights.
The Takeaway. 1  Although there is some genetic variation, most adults need between 7.5 to 8.5 hours of sleep per 24-hour period to function optimally. 2  You can find your optimal sleep time if you set aside several days (perhaps during a vacation) to allow yourself to sleep as long as possible. Once you know how much sleep you need, it's important to allot that amount of time in your daily schedule for sleep.