2. 计算机
  3. In　the　following　essay,　each　blank　has　four　choices.　Choose　the　most　suitable　one　from　the　four　choices　and　write　down　in　the　an

In　the　following　essay,　each　blank　has　four　choices.　Choose　the　most　suitable　one　from　the　four　choices　and　write　down　in　the　an

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问题 In　the　following　essay,　each　blank　has　four　choices.　Choose　the　most　suitable　one　from　the　four　choices　and　write　down　in　the　answer　sheet.A　socket　is　basically　an　end　point　of　a　communication　link　between　two　applications.　Sockets　that　extend　over　a　network　connect　two　or　more　applications　running　on(31)computers　attached　to　the　net-work.　A　socket(32)two　addresses:(33).　Sockets　provide　a(34)communication　channel　between　one　or　more　systems.　There　are(35)sockets　separately　using　TCP　and　UDP.
选项 A、full-duplex
B、half-duplex
C、simplex
D、complex
答案A
解析
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