D-Link DAP-2553 User Manual page 65

Section 3 - Configuration
DNS:
Enter the IP address of the Domain Name System (DNS) server. The DNS server translates domain names such as www.dlink.
com into IP addresses.
Domain Name:
Enter the domain name of the network, if applicable. (An example of a domain name is: www.dlink.com.)
Lease Time
The lease time is the period of time before the DHCP server will assign new IP addresses.
(60-31536000
sec):
D-Link DAP-2553 User Manual 65