Answer: (D)DoS attack.
Explanation:
Denial of Service attack occurs when an hacker prevents the real users from accessing the service by sending excessive message to the server asking it to authenticate requests with invalid return address.
Answer:The process of sketching in engineering might resemble a loop because of the design process.
Explanation: The design process is a loop or cycle to improve a design. So, sketches will be shown to other engineers and they will improve on the design until it is effective and efficient.
Answer:
The flashdrive can hold 35389 400-pages-books
Explanation:
If
of a page occupies 1 kB of memory, we can calculate how much memory a book will take

Now that we know that a book average file size is about 266,67 kB, we calculate how many of them can a 9 GB flash drive hold.
To do the calculation, we have to know how many kilobytes are in 9 gigabytes.
There is 1024 kilobytes in a megabyte, and 1024 megabytes in a gigabyte, so:

Finally, knowing the average file size of a book and how much memory in kilobytes the 9 GB flash drive holds, we calculate how many books can it hold.

The flashdrive can hold 35389 400-pages-books, or 14155776 pages of typical text.