Which two statements about SNMP are true? (Choose two)

A.
SNMP operates at Layer-6 of the OSI model.

B.
NMS sends a request to the agent at TCP port 161.

C.
NMS sends request to the agent from any source port.

D.
NMS receives notifications from the agent on UDP 162.

E.
MIB is a hierarchical representation of management data on NMS.