●A firewall is a (68) system designed to (69) all organization,s network aga-inst threats.

●Windows XP is Microsoft's most advanced desktop (70) system.

●Functional testing tests whether the output is the expected (71) with the valid input.

●Thebasic concept of a data (72) is the difference between data and information.

●Communication networks can be classified in terms of their physical arrangement or (73) Three common (73) are the star,bus,and ring.

●An operating system is (74) .