The Simple Network Management Protocol (SNMP) is used to manage devices such as routers, hubs, and switches. SNMP works with an SNMP agent and an SNMP management station in which layer of the OSI model?

The Simple Network Management Protocol (SNMP) is used to manage devices such as routers, hubs, and switches. SNMP works with an SNMP agent and an SNMP management station in which layer of the OSI model?

• A. Data Link Layer
• B. Transport Layer
• C. Application Layer
• D. Network Layer

Answer: (C)

SNMP is an application-layer protocol. It defines the management operations, data structures (the MIB), and message formats that the management software uses to interact with devices. The SNMP agent on a device and the SNMP manager exchange Get, GetNext, GetBulk, Set, and Trap messages that are interpreted by the application logic of these programs. While SNMP messages are typically transported over UDP (a transport layer concern in TCP/IP), the OSI model nests the protocol’s meaning and data handling at the Application layer. This is why the correct layer is the Application layer.

SNMP is an application-layer protocol. It defines the management operations, data structures (the MIB), and message formats that the management software uses to interact with devices. The SNMP agent on a device and the SNMP manager exchange Get, GetNext, GetBulk, Set, and Trap messages that are interpreted by the application logic of these programs. While SNMP messages are typically transported over UDP (a transport layer concern in TCP/IP), the OSI model nests the protocol’s meaning and data handling at the Application layer. This is why the correct layer is the Application layer.