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.
Infants and Children. According to the Mayo Clinic, infants often sleep for up to 16 hours each day. Preschoolers should get about 11 hours of sleep each night, and children under the age of 13 should get about 10 hours of sleep a night. Teenagers should get nine hours of sleep a night. Kids Health from Nemours notes that getting enough sleep is critical for children because lack of sleep may affect their growth rate.