Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) v1.2Network AssuranceEasy
A network administrator needs to monitor the real-time resource utilization (CPU, memory) of several Cisco routers and switches across the enterprise network and wants to receive immediate alerts if any device exceeds predefined thresholds. Which network assurance technology is best suited for this requirement?
- ANetFlow
- BSPAN
- CSNMP Polling and Traps
- DIP SLA
Show answer & explanationAnswer & explanation
Correct answer: C. SNMP Polling and Traps
SNMP polling allows for periodic collection of device metrics like CPU and memory, while SNMP traps provide immediate notifications when predefined thresholds are breached, fulfilling the requirement for real-time monitoring and alerts.
Why the other options are wrong
- A. NetFlow is primarily for collecting IP traffic flow information, not device resource utilization.
- B. SPAN duplicates traffic for analysis and does not provide device resource utilization or alerting capabilities.
- D. IP SLA measures network performance between devices, not internal device resource metrics.
SNMP Polling and Traps
SNMP (Simple Network Management Protocol) is used to manage network devices. Polling involves a manager periodically requesting data from agents, while traps are unsolicited messages sent by agents to managers upon significant events.
- Polling gathers current state data (e.g., CPU, memory).
- Traps provide immediate notifications for critical events or threshold breaches.
- Requires an SNMP manager and agents configured on network devices.
Memory trick: SNMP: See Network Metrics, Send Notifications Promptly.