1 Click Refresh Events. New events are added to the list, and unknown traffic events return to the list if they have not been resolved.  You can also test resolving unknown traffic events by clicking My Dashboards > NetFlow > NTA Summary. You should no longer see a banner regarding unknown flow traffic.
An implicit interest rate is the nominal interest rate implied by borrowing a fixed amount of money and returning a different amount of money in the future.
The implicit cost for a firm can be thought of as the opportunity cost related to undertaking a certain project or decision, such as the loss of interest income on funds, or depreciation of machinery used for a capital project.