When the auth keyword is used in the snmp-server host command, which of the following must be configured
with an authentication mechanism?

A.
the interface

B.
the host

C.
the user

D.
the group

Explanation:
The auth keyword specifies that the user should be authenticated using either the HMAC-MD5 or HMAC-SHA
algorithms. These algorithms are specified during the creation of the SNMP user.
For example, the following command creates a user named V3User who will be a member of the SNMP group
V3Group and will use HMAC-MD5 with a password of Password:
snmp-server user V3User V3Group v3 auth md5 PasswordThe authentication mechanism is not configured on the interface. All SNMP commands are executed at the
global configuration prompt.
The authentication mechanism is not configured at the host level. The version and security model
(authentication, authentication and encryption, or neither) are set at the host level.
The authentication mechanism is not configured at the SNMP group level. The group level is where access
permissions like read and write are set. This is why a user account must be a member of a group to derive an
access level, even if it is a group of one.
Objective:
Infrastructure Management
Sub-Objective:
Configure and verify device-monitoring protocols

Configuring SNMP Support > Understanding SNMP > SNMP Versions
Cisco IOS Network Management Command Reference > snmp-server engineID local through snmp trap linkstatus > snmp-server host