The true statements regarding SNMP (Simple Network Management Protocol) from the options provided are:
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SNMPv2c introduced the INFORM operation. - This statement is true; SNMPv2c introduced the INFORM operation, which allows for more robust communication between managers and agents compared to the earlier versions.
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SNMPv3 provides the best security of the three versions. - This statement is also true; SNMPv3 was designed with security in mind, providing features like authentication and encryption that are not available in SNMPv1 and SNMPv2c.
The other options are incorrect:
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SNMPv2c offers more security than SNMPv1. - While SNMPv2c does improve functionality (with features like bulk retrieval and more detailed error handling), it does not provide enhanced security features compared to SNMPv1.
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SNMPv3 uses TCP and introduced the GETBULK operation. - SNMP traditionally uses UDP, not TCP. The GETBULK operation was introduced in SNMPv2c, not in SNMPv3.
Therefore, the correct choices are:
- SNMPv2c introduced the INFORM operation.
- SNMPv3 provides the best security of the three versions.