Answer: C) DNS poisoning
Explanation: DNS poisoning or DNS cache poisoning is the type of attacking tendency towards the URL of the computer. These attempt to attack the URL using the spam mails and the user usually end up clicking on the URL provided by the attacker which invokes attack in the computer.
This mechanism takes place in the emails as well as the selected websites which can be accessed by the users easily.These attacks once enter the system seems like the real thing and become prone to many risks .
Answer:
The undo tool.
Explanation:
Microsoft Excel is a spreadsheet application developed by Microsoft, it is used for analysing data. It's worksheets are made up of columns and rows or fields and records.
There are different ways of entering data to a cell. Click on the cell and type the data, copy and paste to the target cell, double-click on the cell to correct data and click on a cell and press the spacebar key to clear the data.
Excel records the action of event, so when a mistake is made like deleting a crucial cell data value, the undo tool is used to recover the data, since it holds records of events. The redo tool is the reverse of the undo tool.
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