SNMP Transport Mappings

Once a message has been generated, it is sent using the protocols at the levels below the application layer where SNMP resides. As you saw in the overview of the SNMP protocol in the previous chapter, the current SNMP standard set separates the description of protocol operations and PDUs from the methods used to actually send them.

Starting with version 2, SNMP has defined several transport mappings that describe how SNMP PDUs can be sent over a variety of internetworking protocol suites, including TCP/IP, OSI, IPX/SPX (Novell), and AppleTalk. Many of the specific details of SNMP messaging depend on the transport mapping that is used in a particular implementation. SNMP is primarily used on TCP/IP internetworks, and TCP/IP ...

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