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8177 Views 1 Reply Latest reply: May 12, 2011 6:59 PM by Muhammad Furqan RSS

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How DHCP works - Interview question

May 12, 2011 6:17 PM

TimePilot 37 posts since
Jun 26, 2010

Can anyone give me a simple explination of dhcp works. ????



I recently gave a very long explination and of course the person I was speaking too did not like it.



  • Muhammad Furqan 73 posts since
    Jun 19, 2009
    Currently Being Moderated
    1. May 12, 2011 6:59 PM (in response to TimePilot)
    Re: How DHCP works - Interview question

    DHCP is a protocol used for automatic configuration of computers connected to IP networks. DHCP operates on a client server model in four phases:


    Discover: A client broadcasts DHCP Discover message when it comes alive on the network.

    Offer: When a DHCP server receives the DHCP Discover message from the client, it reserves an IP address for the client and sends a DHCP Offer message to the client offering the reserved IP address.

    Request: The client receives the DHCP offer message and broadcasts a DHCP request message to show its consent to accept the offered IP address.

    Acknowledge: When the DHCP server receives the DHCP Request message from the client, it sends a DHCP Ack packet to the client. At this point the IP configuration process is complete.


    For details, please refer to any good text on TCP/IP.



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