Ais the layered structure of hardware and software that supports the exchange of data between systems and supports distributed applications such as electronic mail and file transfer.

Any multiple choices

Cprogram to find //perimeter of rectangle printf(" \n perimeter of rectangle \n"); printf(""); printf("\n enter width and length of the rectangle : "); scanf("%f%f", & width,& length); perimeter = 2 * (width + length); printf("perimeter of rectangle is: %.3f", perimeter);  

First one good luck