Which protocol provides authenticated access to retrieve data from a Management Information Base (MIB)?

Which protocol provides authenticated access to retrieve data from a Management Information Base (MIB)?

• A. SNMPv3
• B. SNMPv2c
• C. TLV
• D. CDP

Answer: (A)

Accessing data from a MIB requires a protocol that can verify who is asking and protect the information in transit. SNMP is the protocol used to read and manage MIB objects. Among SNMP versions, only SNMPv3 adds strong authentication through the User-based Security Model, with options for encryption as well. This means you can reliably confirm the identity of the manager and, if desired, keep the retrieved data confidential, which is essential for authenticated access to MIB data. SNMPv2c relies on community strings, which act like simple shared secrets and are not a true authentication mechanism, so it doesn’t provide robust authenticated access. TLV is a data encoding format used inside various protocols, not a protocol that governs access or authentication for MIB data. CDP is a device discovery protocol and has nothing to do with retrieving MIB information securely. So the best choice for authenticated access to retrieve data from a MIB is SNMPv3.

Accessing data from a MIB requires a protocol that can verify who is asking and protect the information in transit. SNMP is the protocol used to read and manage MIB objects. Among SNMP versions, only SNMPv3 adds strong authentication through the User-based Security Model, with options for encryption as well. This means you can reliably confirm the identity of the manager and, if desired, keep the retrieved data confidential, which is essential for authenticated access to MIB data.

SNMPv2c relies on community strings, which act like simple shared secrets and are not a true authentication mechanism, so it doesn’t provide robust authenticated access. TLV is a data encoding format used inside various protocols, not a protocol that governs access or authentication for MIB data. CDP is a device discovery protocol and has nothing to do with retrieving MIB information securely.

So the best choice for authenticated access to retrieve data from a MIB is SNMPv3.