NPM Practice Questions

This is the designed function of Transforms in UnDP. A transform takes the raw polled value and applies a mathematical formula to it before storing it in the database. In this case, creating a formula like '{Value} / 10' will correctly convert the integer (255) into the desired decimal value (25.5).

NetPath is the NPM feature designed for exactly this scenario. It provides advanced hop-by-hop analysis from a source server/probe to a destination service, whether internal or external. It visualizes the entire path, measures performance (latency, packet loss) at each hop, and can identify the specific node or ISP where a problem is occurring.

PerfStack (Performance Analysis) is the Orion Platform feature designed for cross-stack data correlation. It allows an administrator to drag metrics from any monitored entity (nodes, interfaces, applications, database queries, etc.) from any integrated module (NPM, SAM, DPA, etc.) onto a common timeline. This enables visual correlation to identify root causes, such as seeing a spike in WAN traffic that corresponds directly to a spike in server CPU and database latency.

A major advantage of Orion Maps is its intelligence and automation. It can leverage topology data (from CDP, LLDP, routing tables) to automatically generate maps, showing connections and dependencies. It is also context-aware, meaning you can drill into a map from a node or interface and see its relevant connections, whereas Network Atlas maps were mostly static creations.

This describes the correct, end-to-end process. The web-based Report Manager allows for the creation of reports using various resources, including custom tables. The table can be configured to show the Top 10 interfaces sorted by the 'Total Bytes Transferred' metric. Once the report is designed, a schedule can be attached to it to automate the generation and emailing of the PDF on the required cadence.

This is the highest security level for SNMPv3. It provides both authentication (auth) to verify the message source and privacy (priv) through encryption of the data payload. This ensures message integrity, authenticity, and confidentiality, meeting the highest security requirements.

MIBs often use definitions and object types from other, more standard MIBs (e.g., RFC1213-MIB). If a vendor MIB references an object from a parent MIB that is not already present in the Orion MIB database, the compiler will fail because it cannot resolve the dependency. The solution is to load the required parent MIBs first.

The authPriv security level provides both authentication and encryption (privacy), which is the strongest security available in SNMPv3 and is essential to meet the audit requirement.

The security of SNMPv3 relies on the strength of the passphrases. Using weak or default passwords would undermine the security provided by the protocol, even with authPriv enabled.

When using authPriv, you must select both an authentication protocol (e.g., SHA) and a privacy protocol. Choosing a strong encryption algorithm like AES is crucial for ensuring data confidentiality.

This is the primary difference. An SNMP Trap is a 'fire-and-forget' message; the sending device does not know if it was received. An SNMP Inform is a confirmed message; the management station must send an acknowledgment (response PDU). If no acknowledgment is received, the agent may resend the Inform. This makes Informs more reliable for critical notifications.

The Universal Device Poller (UnDP) is the designated tool in NPM for this exact purpose. It allows administrators to define custom pollers for any metric available via an SNMP OID. Once created, the poller can be assigned to the node, and its data can be charted, displayed, and used in alerts just like a native metric.