<acronym id="pzdee"><menuitem id="pzdee"><ins id="pzdee"></ins></menuitem></acronym>

<pre id="pzdee"></pre>

單項選擇題

（）is not a physical wall, but a lot of virtual data to protect the computer network.

A.Data wall
B.Data Channel
C.Data base
D.firewall

你可能感興趣的試題

單項選擇題

（） is meant to provide facility for customer’s need or inquiry and arrange it.

A.Service
B.business
C.customer service
D.making money

單項選擇題

Saving or reducing expenditure in business is （）

A.Save money
B.Increase cost
C.cost planning
D.cost control