<s>
dhcpd	B-Protocol
(	O
an	O
abbreviation	O
for	O
"	O
DHCP	B-Protocol
daemon	B-Operating_System
"	O
)	O
is	O
a	O
DHCP	B-Protocol
server	I-Protocol
program	O
that	O
operates	O
as	O
a	O
daemon	B-Operating_System
on	O
a	O
server	B-Application
to	O
provide	O
Dynamic	B-Protocol
Host	I-Protocol
Configuration	I-Protocol
Protocol	I-Protocol
(	O
DHCP	B-Protocol
)	O
service	O
to	O
a	O
network	B-Architecture
.	O
</s>
<s>
This	O
implementation	O
,	O
also	O
known	O
as	O
ISC	B-Protocol
DHCP	I-Protocol
,	O
is	O
one	O
of	O
the	O
first	O
and	O
best	O
known	O
,	O
but	O
there	O
are	O
now	O
a	O
number	O
of	O
other	O
DHCP	B-Protocol
server	I-Protocol
software	O
implementations	O
available	O
.	O
</s>
<s>
Clients	B-Protocol
may	O
solicit	O
an	O
IP	B-Protocol
address	I-Protocol
from	O
a	O
DHCP	B-Protocol
server	I-Protocol
when	O
they	O
need	O
one	O
.	O
</s>
<s>
The	O
DHCP	B-Protocol
server	I-Protocol
then	O
offers	O
the	O
"	O
lease	O
"	O
of	O
an	O
IP	B-Protocol
address	I-Protocol
to	O
the	O
client	O
,	O
which	O
the	O
client	O
is	O
free	O
to	O
request	O
or	O
ignore	O
.	O
</s>
<s>
If	O
the	O
client	O
requests	O
it	O
and	O
the	O
server	B-Application
acknowledges	O
it	O
,	O
then	O
the	O
client	O
is	O
permitted	O
to	O
use	O
that	O
IP	B-Protocol
address	I-Protocol
for	O
the	O
"	O
lease	O
time	O
"	O
specified	O
by	O
the	O
server	B-Application
.	O
</s>
<s>
At	O
some	O
point	O
before	O
the	O
lease	O
expires	O
,	O
the	O
client	O
must	O
re-request	O
the	O
same	O
IP	B-Protocol
address	I-Protocol
if	O
it	O
wishes	O
to	O
continue	O
to	O
use	O
it	O
.	O
</s>
<s>
Issued	O
IP	B-Protocol
addresses	I-Protocol
are	O
tracked	O
by	O
dhcpd	B-Protocol
through	O
a	O
record	O
in	O
the	O
dhcpd.leases	O
file	O
.	O
</s>
<s>
This	O
allows	O
the	O
server	B-Application
to	O
maintain	O
state	O
over	O
restarts	O
of	O
the	O
dhcp	B-Protocol
service	O
,	O
which	O
could	O
otherwise	O
lead	O
to	O
duplicate	O
IP	B-Protocol
addresses	I-Protocol
being	O
issued	O
when	O
server	B-Application
issued	O
the	O
same	O
IP	B-Protocol
address	I-Protocol
again	O
while	O
another	O
client	O
still	O
has	O
the	O
right	O
to	O
use	O
it	O
.	O
</s>
<s>
This	O
reference	O
implementation	O
of	O
DHCP	B-Protocol
is	O
developed	O
by	O
the	O
Internet	O
Systems	O
Consortium	O
and	O
is	O
supported	O
on	O
Linux	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
FreeBSD	B-Operating_System
,	O
and	B-Application
Solaris	I-Application
.	O
</s>
<s>
Remote	O
access	O
to	O
a	O
running	O
instance	O
of	O
dhcpd	B-Protocol
is	O
provided	O
by	O
the	O
Object	O
Management	O
Application	O
Programming	O
Interface	O
(	O
OMAPI	B-Protocol
)	O
.	O
</s>
<s>
This	O
API	O
allows	O
manipulation	O
of	O
the	O
internal	O
state	O
of	O
a	O
running	O
instance	O
of	O
the	O
dhcpd	B-Protocol
server	B-Application
or	O
client	O
.	O
</s>
<s>
On	O
the	O
server	B-Application
side	O
,	O
this	O
interface	O
allows	O
editing	O
of	O
registration	O
information	O
for	O
managed	O
nodes	B-Device
.	O
</s>
<s>
Uses	O
on	O
the	O
client	O
include	O
fetching	O
configuration	O
information	O
,	O
releasing	O
and	O
renewing	O
leases	O
,	O
and	O
changing	O
which	O
interfaces	O
are	O
managed	O
by	O
the	O
DHCP	B-Protocol
client	O
.	O
</s>
<s>
ISC	B-Protocol
DHCP	I-Protocol
was	O
declared	O
End-of-Life	O
in	O
October	O
,	O
2022	O
.	O
</s>
<s>
ISC	O
is	O
developing	O
a	O
new	O
DHCP	B-Protocol
software	O
system	O
,	O
which	O
is	O
intended	O
to	O
eventually	O
replace	O
it	O
.	O
</s>
<s>
This	O
software	O
,	O
Kea	B-Protocol
,	O
includes	O
a	O
DHCP	B-Protocol
server	I-Protocol
only	O
(	O
so	O
,	O
no	O
client	O
or	O
relay	O
yet	O
)	O
and	O
is	O
supported	O
on	O
the	O
same	O
platforms	O
as	O
ISC	B-Protocol
DHCP	I-Protocol
.	O
</s>
<s>
It	O
is	O
distributed	O
under	O
the	O
Mozilla	B-License
Public	I-License
License	I-License
(	O
MPL2.0	B-License
)	O
.	O
</s>
<s>
ISC	B-Protocol
DHCP	I-Protocol
adopted	O
the	O
Mozilla	B-License
Public	I-License
License	I-License
(	O
MPL2.0	B-License
)	O
with	O
the	O
release	O
of	O
4.4.1	O
.	O
</s>
