A network administrator must configure an enterprise router to send unsolicited critical event notifications to a central Network Management System (NMS). The administrator needs to ensure that any lost notification messages are detected and retransmitted by the router if the NMS fails to receive them. Which notification type and operational mechanism should the administrator implement?
- SNMP Informs, because the NMS returns an acknowledgment PDU to the router upon receipt, triggering a retransmission if unacknowledgedCevap
- BSNMP Traps, because Traps establish a reliable TCP session on port 162 to guarantee message delivery and sequencing
- CSNMP Traps, because Traps store unacknowledged notifications in flash memory until an explicit SNMP GET request is received from the NMS
- DSNMP Informs, because Informs bypass interface Access Control Lists by operating at Layer 2 using raw Ethernet framing
Cevap
SNMP Informs should be implemented because the NMS returns an acknowledgment PDU to the agent upon receiving an Inform notification, allowing the router to retransmit the notification if no acknowledgment is received.
SNMP Informs provide reliable notification delivery because the receiver (NMS) returns an acknowledgment (Response PDU) back to the sender. If the sending agent does not receive the response within the configured timeout period, it automatically retransmits the Inform packet.
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SNMP Trap vs Inform Operations and Reliability Mechanics