Explanation
The command "snmp-server user user-name group-name [remote ip-address [udp-port port]] {v1 | v2c | v3 [encrypted] [auth {md5 | sha} auth-password]} [access access-list]" adds a new user (in this case "andy") to an SNMPv3 group (in this case group name "myv3") and configures a password for the user.
In the "snmp-server host" command, we need to:
+ Specify the SNMP version with key word "version {1 | 2 | 3}"
+ Specify the username ("andy"), not group name ("myv3").
Note: In "snmp-server host inside ..." command, "inside" is the interface name of the ASA interface through which the NMS (located at 10.255.254.1) can be reached.

MDM stands for Mobile Device Management, which is a system that performs compliance checks and remote wiping on mobile devices. MDM allows administrators to enforce security policies, monitor device status, and remotely manage devices in case of loss, theft, or compromise. MDM can also integrate with other Cisco security solutions, such as ISE, AMP, and Umbrella, to provide enhanced protection and visibility for mobile devices. References:
* Mobile Device Management (MDM) - Cisco
* Implementing and Operating Cisco Security Core Technologies (SCOR) - Module 5: Secure Network Access