Hi, Is your question about whether the Instant On AP can act as a DHCP server? If so, Yes!
Instant On APs now have a router mode where the AP can be directly plugged into the modem. The AP comes with a built-in DHCP server, NAT and firewall. The AP will then provide DHCP addresses to other APs and clients in the network. If you need to connect a switch to the AP, you can use the AP11D which has wired ports.
Hope that answers your question