Which protocol can cause overload on a CPU of a managed device?

D

The correct answer is D. SNMP (Simple Network Management Protocol) can cause overload on a CPU of a managed device.

SNMP is a protocol used to manage and monitor network devices. It allows network administrators to monitor network performance, detect network faults, and troubleshoot network problems. However, SNMP can also cause a high CPU load on a managed device if it is misconfigured or if there are excessive SNMP requests.

When SNMP is enabled on a managed device, it listens on a well-known port (UDP 161) for incoming SNMP requests. If the device receives a large number of SNMP requests, its CPU can become overwhelmed as it tries to process all the requests. This can result in slow network performance and even device failure.

To avoid SNMP-related CPU overload, network administrators can implement SNMP throttling, which limits the number of SNMP requests that a managed device can process in a given time period. Additionally, network administrators can optimize SNMP configurations to minimize the number of SNMP requests and reduce the frequency of polling.

In contrast, Netflow, WCCP, and IP SLA are not likely to cause CPU overload on a managed device. Netflow is a protocol used for traffic analysis and can generate a lot of traffic, but it does not require a lot of CPU processing. WCCP (Web Cache Communication Protocol) is used to redirect web traffic to a cache server and does not involve a lot of processing on the managed device. IP SLA (Internet Protocol Service Level Agreement) is used for measuring network performance and does not require significant CPU processing.