Number of BOOTP relay agent hops 

If a request has traveled through more than a given number of BOOTP relay agents, it is dropped. The default maximum number of relay agent hops is 4, and it is not likely that this number will be surpassed unless your network is set up to pass requests through several BOOTP relay agents before reaching a DHCP server.

Verification of IP address availability before making an offer 

By default, the server pings an IP address before offering it to a requesting client to verify that it is not already in use. You can disable this feature to decrease the time it takes to make an offer, while running the risk of having duplicate IP addresses in use.

Automatic reading of dhcptab at specified intervals

The server can be set to automatically read the dhcptab at the interval you specify. If your network configuration information does not change frequently, and you do not have multiple DHCP servers, it is not necessary to reload dhcptab automatically. Also note that DHCP Manager gives you the option to have the server reload dhcptab after making a change to the data.

Length of time to reserve an IP address that has been offered 

After a server offers an IP address to a client, it caches the offer, during which time the server does not offer the address again. You can change the period of time for which the offer is cached. The default is 10 seconds. On slow networks, you made need to increase the offer time.