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

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Study for the CPSA Port Numbers Exam. Practice with flashcards and multiple choice questions, each with hints and explanations. Get ready for your test!

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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