A terminal failed to register with GK and found that the rejection code of GK was gkRejGkNoEnoughRegTable. Which may be caused?

A terminal failed to register with GK and found that the rejection code of GK was gkRejGkNoEnoughRegTable. Which may be caused?
A . When SwitchCentre defines the terminal to use password authentication, the password provided when the terminal initiates a registration request to SwitchCentre is incorrect.
B . Network segment bandwidth restrictions are configured on SwitchCentre.
C . Non-standard terminals register with SwitchCentre. The registration signaling is illegal and fields are missing.
D . When the number of nodes registered on SwitchCentre has reached the value specified by the license

Answer: D