> # Information About SNMP Security

> SNMP is an application layer protocol that facilitates the exchange of management information between network devices. In all Cisco MDS 9000 Family switches, three SNMP versions are available: SNMPv1, SNMPv2c, and SNMPv3.

> This section includes the following topics:

> - SNMP Version 1 and Version 2c
> - SNMP Version 3
> - SNMPv3 CLI User Management and AAA Integration
> - CLI and SNMP User Synchronization
> - Restricting Switch Access
> - Group-Based SNMP Access
> - Creating and Modifying Users
> - AES Encryption-Based Privacy
> - Enabling SNMP Notifications
> - LinkUp/LinkDown Notifications for Switches

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