Which three security features were introduced with the SNMPv3 protocol? (Choose three.)
A. Message integrity, which ensures that a packet has not been tampered with in-transit
B. DoS prevention, which ensures that the device cannot be impacted by SNMP buffer overflow
C. Authentication, which ensures that the message is from a valid source
D. Authorization, which allows access to certain data sections for certain authorized users
E. Digital certificates, which ensure nonrepudiation of authentications
F. Encryption of the packet to prevent it from being seen by an unauthorized source
