DHCP Options

DHCP Options are additional IP address settings that a DHCP server passes to DHCP clients.

What is DHCP Options?

DHCP Options are additional IP address settings that a DHCP server passes to DHCP clients. When a DHCP client requests an IP address from a DHCP server, the server sends the client at least an IP address and a subnet mask value. Additional information can be sent to clients if you configure various DHCP options.

DHCP Options
DHCP Options

You can assign these options globally to all DHCP clients, to clients belonging to a particular scope, or to an individual host on the network.

You can configure a number of different DHCP options using the Microsoft Windows NT administrative tool DHCP Manager and the Windows 2000 snap-in DHCP console, but the options listed in the following table are the ones most commonly used by Microsoft DHCP clients. In Windows NT–based networks options 3, 6, 44, and 46 are the most commonly used, while in Windows 2000–based networks options 3, 6, and 15 are commonly used.DHCP Options

NumberOptionWhat It Configures
003RouterDefault gateway IP address
006DNS ServersIP addresses of DNS servers
015DNS Domain NameParent domain of associated DNS servers
044NetBIOS over TCP/IP Name ServerIP addresses of Windows Internet Name Service (WINS) server
046NetBIOS over TCP/IP Node TypeMethod of NetBIOS name resolution to be used by the client
047NetBIOS over TCP/IP ScopeRestricts NetBIOS clients to communication with clients that have the same scope ID


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