1.

THE_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚Àւ§SOCKET‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•_PROTOCOL_IS_PERMITTED_ON_WHICH_OPERATING_SYSTEMS??$#

A. all
B. unix only
C. windows only
D. none
Answer» C. windows only


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