# Nodal Delay

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d_"nodal" =
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JustinLiller.Nodal Delay
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7fb51e88-e81b-11e3-b7aa-bc764e2038f2

The Nodal Delay calculator computes the sum of the processing, queuing, transmission, and propagation delay in a network.

INSTRUCTIONS:  Choose time units and enter the following:

• (dproc) Processing Delay
• (dqueue)  Queuing Delay
• (dtrans)  Transmission Delay
• (dprop) Propagation Delay

Nodal Delay (dnodal):  The calculator returns the Total Nodal Delay (dnodal) is milliseconds(ms).  However, this can be automatically converted to numerous other time units (e.g. nano or microseconds) via the pull-down menu.

#### The Math / Science

Nodal Delay is the sum of the processing, queuing, transmission, and propagation delay in a network. The contribution of these delay components can vary significantly. For example, dprop can be negligible (for example, a couple of microseconds) for a link connecting two routers on the same university campus; however, dprop is hundreds of milliseconds for two routers interconnected by a geostationary satellite link, and can be the dominant term in dnodal. Similarly, dtrans can range from negligible to significant.