COGNITIVE ASSESSMENT
A host in a network performs which of the following tasks?
A. Ensures satellite communications are functional
B. Exclusively monitors wireless networks to search for data transmission errors
C. Routes transmissions over a network to guarantee data reaches its intended destination
D. Provides services and connections to other computers on the network
Answer: D
Computer Science & Information Technology
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When a field does not contain a value, either because that value is unknown or inapplicable, it is called a(n) ____ value.
A. void B. empty C. null D. redundant
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