Which port and protocol is used by SNMP traps for event notifications?

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Prepare for the CPSA Port Numbers Exam with quizzes on port numbers, services, and protocols. Each question is accompanied by hints and detailed explanations. Get exam-ready with our comprehensive study tool!

Multiple Choice

Which port and protocol is used by SNMP traps for event notifications?

Explanation:
SNMP traps are asynchronous notifications that an agent sends to the management system, and they use UDP for this lightweight, fire-forget delivery. The standard destination port for these event notifications is UDP port 162, which is what the manager listens on to receive traps (and informs, which are a related type of notification). Port 161 is used for normal SNMP requests from the manager to the agent, not for traps. The other ports listed correspond to unrelated services, so they don’t fit SNMP traps. In short, event notifications in SNMP travel over UDP 162.

SNMP traps are asynchronous notifications that an agent sends to the management system, and they use UDP for this lightweight, fire-forget delivery. The standard destination port for these event notifications is UDP port 162, which is what the manager listens on to receive traps (and informs, which are a related type of notification). Port 161 is used for normal SNMP requests from the manager to the agent, not for traps. The other ports listed correspond to unrelated services, so they don’t fit SNMP traps. In short, event notifications in SNMP travel over UDP 162.

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