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A protocol data unit (such as an IP datagram) is wholly contained in the payload of a Frame Relay frame.
Protocol Autosense is especially useful in multiprotocol network environments, where the analyzer is able to perform decodes on a protocol data unit (pdu) by pdu basis.
Included in the new release of Envoy is support for the new network management and security features included in SNMP V2, such as the new manager-to-manager Manager Information Base, the GetBulk Protocol Data Unit (PDU), and authentication and privacy.

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