How Clients Acquire IP Addresses
When you configure a Windows client operating system to use
the DHCP service, upon startup the client will use an ARP broadcast in its
subnet to request IP configuration from any DHCP server that may receive the
request. Because DHCP uses broadcasts to initiate communications, DHCP servers
are limited to communication within their IP subnets.
DHCP Leases
DHCP allocates IP addresses on a dynamic basis. This is
known as a lease. You can configure the duration of the lease. The default
lease time for wired clients is eight days. When the DHCP lease has reached 50
percent of the lease time, the client attempts to renew the lease.
DHCP Server Authorization
If the server is a domain member, you must
authorize the Windows Server 2012 DHCP server role in Active Directory Domain
Services (AD DS) before it can begin leasing IP addresses. You must be an
Enterprise Administrator to authorize the DHCP server. Stand-alone Microsoft
servers verify whether there is a DHCP server on the network, and do not start
the DHCP service if this is the case
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