Which of the following statements is true regarding SNMPv$3$ security?

Select one:

a$.$ TSM enables security to be applied the Data Link layer.

b$.$ USM provides message$-$based security and uses asymmetric cryptography.

c$.$ TSM uses symmetric encryption along with usernames and passwords for messagebased security.

$$ d$.$ SNMPv$3$ only supports security at the Application layer.