________ are used to improve database performance and increase data reliability

Which of the following features can be used as a simple firewall within wireless routers and WAPs?

a. Filtering b. Access logs c. VPNs d. NAT

Consider the following function and code segment.

``` void One( int first, int & second ) { first = 17; second = first + 1; } int main() { // other code ... int j = 4; int k = 3; One(j, k); // other code .. } ``` After the call to One(j, k); what are the values of j and k? Why? a) j == 4, k == 3; b) j == 17, k == 18; c) j == 4, k == 18; d) j == 17, k == 3;