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Moreover, the Session Protocol Data Unit (SPDU) transfer delay as a function of normalized distance from Node B is shown in Figure 4.
A protocol data unit (such as an IP datagram) is wholly contained in the payload of a Frame Relay frame.
The system features an advanced protocol data unit (PDU) builder that allows users to quickly and easily create virtually any type of Layer 2 to Layer 7 test packet or frame, and apply any type of network encapsulation to it, including L2oMPLS, L2TP, GRE, VLAN, Frame Relay and PPP encapsulations.

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