New features in SNMPv3

The version is upgraded to SNMPv3 from SNMPv2
The new security modules are added in an nSnmp driver of SNMPv3 to provide the security and administrations. Three levels of security modules are added in SNMPv3 as follows:
- NoAuthNoPriv
- AuthNoPriv
- AuthPriv.
The SHA Authentication Protocol is added to support the SNMPv3.
The DES, Aes 128, Aes192 , and Aes256 Privacy Protocols are added to support the SNMPv3.
The UsmUserTable is added. This table is a part of security.
The access control is improved for user. The four master Configuration Tables are added:
- VacmContextTable
- VacmGroupTable
- VacmViewTreeTable
- VacmAccessTable.
The AuthPriv exchange of messages is encrypted and decrypted so the MIB walk will take more time.