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TCP/IP Guide by Charles M. Kozierok

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DHCP Lease Allocation, Reallocation, and Renewal

To implement DHCP, an administrator must first set up a DHCP server and provide it with configuration parameters and policy information: IP address ranges, lease length specifications, and configuration data that DHCP hosts will need to be delivered to them. Host devices can then have their DHCP client software enabled, but nothing will happen until the client initiates communication with the server. When a DHCP client starts up for the first time, or when it has no current DHCP lease, it will be in an initial state where it doesn't have an address and needs to acquire one. It will do so by initiating the process of lease allocation.

Before we examine the steps in the lease allocation, reallocation, ...

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