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.
Much depends on when you need to or are able to wake up each day, and how much sleep you are getting. 1  There is some variation from person to person, but generally adults need 7.5 to 8.5 hours of sleep per day. 2  Children (5 years old and up) and teenagers will need more sleep than this, ranging from 8.5 to 11 hours.