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Die toekenning van IP-adresse verval gewoonlik na 'n voorafbepaalde tydperk, waarna die DHCP-kliënt en -bediener weer 'n ooreenkoms moet bereik oor 'n nuwe IP-adres vanuit die bediener se voorafgedefinieerde adrespoel. DHCP is 'n uitsaai-protokol. Soos met ander uitsaaiverkeer op 'n netwerk gaan dit nie deur 'n [[roetebeheerder]] nie tensy dit spesifiek sodanig opgestel is nie. Gebruikers wat hierdie funksies verlang moet hulle roetebeheerders opstel om DHCP verkeer oor [[UDP]]-poorte 67 en 68 deur te laat.
==Implementerings==
<!-- Moet nog vertaal word ▼[[Microsoft]] introducedhet DHCP onop theirhulle [[Windows NT|NT server-bedieners]] withbekendgestel Windowsvanaf NT versionweergawe 3.5 in latelaat 1994. [[Windows 2000]] anden [[Windows 2003]] includedsluit ook DHCP as a'n productkenmerk featurein. ▼
Die [http://www.isc.org ISC] DHCP-bediener is 'n oopbron DHCP-bediener wat in baie [[Linux]]-verspreidings en baie kommersiële implementerings benut word.
==Implementations==
▲[[Microsoft]] introduced DHCP on their [[Windows NT|NT server]] with Windows NT version 3.5 in late 1994. [[Windows 2000]] and [[Windows 2003]] included DHCP as a product feature.
[[Novell]] het 'n DHCP-bediener in hulle [[Novell NetWare|NetWare]] bedryfstelsel ingesluit sedert weergawe 5 wat in 1998 vrygestel is. Dit word egter as 'n bykomende diens ingesluit aangesien Netware steeds die [[IPX/SPX]] protokolsuite gebruik en daarom word dit nie gereeld op Novell-netwerke gebruik nie.
[http://www.infoblox.com Infoblox] has been shipping a DHCP server appliance since 1999. The Infoblox appliances also include DNS, IP Address Management, RADIUS, TFTP, HTTP, NTP and Syslog.
▲<!-- Moet nog vertaal word
The [http://www.isc.org ISC] DHCP server is an open source DHCP server that is used in many [[Linux]] distributions and many commercial implementations of DHCP.
[http://www.kame.net/ KAME Project] released a DHCPv6 implementation, [[as of 2006|now]] separately maintained. It uses the new home page http://wide-dhcpv6.sourceforge.net/
[[Novell]] has included a DHCP server in their [[Novell NetWare|NetWare]] operating system since version 5, released in [[1998]]. It integrates with Novell's directory service - [[Novell eDirectory]]. For Novell Netware 4, it is an add-on services configured for dynamic allocation of IP, but Netware 4 still natively using [[IPX/SPX]], so it is not widely used on Netware 4.
[http://www.weird-solutions.com Weird Solutions] has produced a variety of multi-platform DHCP implementations since 1997, targeted at both the [[Internet service provider]] and consumer markets.
Other major implementations include:
* [[Cisco Systems|Cisco]], with a DHCP server made available in Cisco IOS 12.0 in February 1999
* [[Sun Microsystems|Sun]], who added DHCP support in the July 2001 release of [[Solaris Operating Environment|Solaris]] 8.
[[Cisco Systems]] offers DHCP servers in routers and switches with their IOS software. Moreover, they offer [http://www.cisco.com/en/US/products/sw/netmgtsw/ps1982/index.html Cisco Network Registrar] (CNR) - a highly scalable and flexible DNS, DHCP and TFTP server.
==Extent of DHCP usage==
Most [[Cable modem|cable internet]] providers in the United States of America use DHCP to allocate IP addresses.
In the UK many broad-band ISP networks use DHCP, but [[XDSL]] providers make extensive use of "infinite lease", which amounts to assigning semi-static IPs.
In addition, many [[router]]s and other gateway devices provide DHCP support for [[computer Network|networks]] running many computers being assigned private IP addresses.
Office networks also use DHCP, in particular when workers make extensive use of laptops which link directly to the in-house network only occasionally .
Network [[router]]s and often [[multilayer switch]]es employ a ''DHCP relay agent'', which relays DHCP "Discover" broadcasts from a LAN which does not include a DHCP server to a network which does have one. These devices may be sometimes configured to append information about port from which DHCP request originates (also known as ''option 82'').
==IP address allocation==
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