A WLAN is implemented using wirel…

A WLAN is implemented using wireless controllers. The APs must locate the controllers when powered on and connected to the network. Which one of the following methods is commonly used to locate the controllers by the APs?

A. DHCP

B. GRE

C. NTP

D. SNMP

Reference: https://books.google.com.pk/books?id=YEW0DAAAQBAJ&pg=SA7-PA9&lpg=SA7-PA9&dq=methods+is+commonly+used+to+locate+the+controllers+by+the+APs&source=bl&ots=O2sMDljjDV&sig=M1_gvQnGaWfGg13Pbb1xTkflklA&hl=en&sa=X&ved=0ahUKEwj3hvmPoaLZAhWRPFAKHb5MAyQQ6AEIJzAA#v=onepage&q=methods%20is%20commonly%20used%20to%20locate%20the%20controllers%20by%20the%20APs&f=false