Answer:
He should disable UPnP technology to disallow devices to dynamically add themselves to the network without configuration.
Explanation:
- UPnP stands for Universal Plug n Play.
- It is an easiest way that allows gadgets to find all other devices connecting to your network.
- This can also modify router settings to allow devices from outside the network to access the router.
- External IP address can also be obtained by the gadget and a new port forwarding map can be set
- So from all perspectives, UPnP is an open invitation for hackers to scan for the ports and hack into the device.
- UPnP is a vulnerability to the secure system
Answer:
It is not valid
Explanation:
I'll assume the question relates to cell referencing in Microsoft Excel.
To reference a cell in Excel, we make use of the following steps:
- Write out the cell column name first
- Followed by the row number
7b implies that, the row number first, followed by the column name; this doesn't follow the naming convention of cells.
Hence, 7b is invalid.
The correct answer is C. The split phase motor has two windings on the stator.
A split phase AC induction motor runs on a single phase and splits the phase into two windings, a run winding, and a start winding, on the stator. The start winding axes is 90 degrees electrically to the run winding. This helps to produce a rotating magnetic field at startup and gets the motor spinning. This secondary 'start' winding on the stator is a key feature of split phase motors.
Answer:
1) Selection, bubble and insertion sort requires no moves in the sorted array because there will be n comparisons in the array and no swapping would take place after each comparison so zero moves.
2) Bubble and insertion sort result in 999 comparisons as we are required to iterate only one time over the array. this can be easily explained from the diagram as in bubble sort all the elements will be in their sorted position so each element will be encountered only once.
3) In selection sort, any element is compared with all the elements and accordingly smaller is paced first so in the reverse sorted array there will be at least n^2 comparisons so n^2 moves.
4) in merge sort an array is always divided into n nos of parts and then sorted so in worst case as well as best case the array will be divided so same numbers of moves.
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