The Domain Name System (DNS) is comprised of four elements; which of the
following is NOT one of these elements?
A. DNS database B. IP addresses
C. name servers D. resolvers
B
Business
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Which of the following words can be either singular or plural?
A) politics B) mumps C) news D) mathematics
Business
Airlines make use of ____________ systems, based on telephone or Web site reservations. This provides enormous cost savings for airlines because it reduces ____________
a. Ticketless; gross revenue charges b. Partial; gross revenue charges c. Ticketless; travel agent commissions d. Partial; travel agent commissions e. Ticketless; net revenue charges
Business