You receive an error message from an iSCSI host stating that there is an authentication error. Which command
would troubleshoot the failure?

A.
iscsi security show

B.
iscsi security generate

C.
iscsi show authentication

D.
iscsi security authentication

Explanation:
https://library.netapp.com/ecmdocs/ECMP1196890/html/man1/na_iscsi.1.html
iscsi security show
Display the default authentication and all the initiator specific authentication information.
Hint: Remember that the iscsi command is mostly structured “iscsi noun verb”, unlike the fcp command which is
structure “fcp verb noun”. Example: iscsi initiator show, fcp show initiator.