Describe a PoE injector.
What will be an ideal response?
PoE injector is a small, inexpensive device that can inject power into an Ethernet cable. These injectors can be endspan devices (such as a network switch enabled to provide power on each port) or a midspan device, which is connected inline to each end device and adds power to the line. Using PoE injectors, a standard, non-PoE-enabled Ethernet switch can be used to supply the data while the PoE injector provides the power.
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Why would you want to use the Increase Decimal or Decrease Decimal buttons on the Home tab?
What will be an ideal response?
__________ enable you to specify, with a single class declaration, a set of related classes.
a) Overloaded classes b) Overriden classes c) Generic classes d) Generics
We have shown the soundness of the algorithm in Figure 6.3—that if A ? closure then A ? X + F .Prove the completeness of this algorithm; that is, if A ? X + F ,then A ? closure at the end of the computation.
Use induction on the length of derivation of X ? A by Armstrong’s axioms.
The Avg operator is used to find the average of the values in a group
Indicate whether the statement is true or false