Answer:
The answers are: it is used to enable fast DNS queries and It can help reduce the amount of network traffic generated by DNS servers.
Explanation:
Because a DNS server can resolve a query from tis local data sends a recursive qyery to a root server.
Answer:
The answer of the the following question are 0(n^2)
The total number of multiplication is 2
And the total number of addition is 1
Explanation:
Let the size of the input is the degree of the polynomial = "n"
Than the number of the multiplications depends on "n"
Let the number of multiplication = M(n)
Let the number of addition = A(n)
1): Solution-
M(n) = n∑_{i=0} i∑_{j=1} 2
= 2 n∑_{i=0} i∑_{j=1}
= 2 n∑_{i=0} i-1+1
= 2 n∑_{i=0} i
= 2 * n*(n+1)/2 = n*(n+1)
= n^2 + n ∈ 0(n^2)
2): Solution for addition-
A(n) = n∑_{i=0} i∑_{j=1} 1
= by solving this from the same way it leads to
= n^2 + n and n^2 + n ∈ 0(n^2)
This is true, A firewall is used to get rid of viruses and attackers and keep them out of your computer. But if not properly implemented can do next to nothing for you.
Solar panels can be very useful, an they help reduce the use of other power plants that release pollutants into the air. Solar panels have some cons, as the very good ones that have better cells that can store more energy are more expensive, but it is worth the investment, because a big enough field of panels can power a lot of a things during a power outage.
If anyone else has anything about the availability of solar panels, feel free to add.
Hope this helps :)
