南理工分布式系统复习题1

1.(21 pts) Please expand the following abbreviated words. 9 wbQ$>G9  
  RPC   TCP/IP DCE RMI IDL UDDI SOAP yT5OFD|T  
tf|;'Nc6  
2.(28 pts) Please give your explanations for the problems. F",TP,X  
(1)    What are the transparencies of a distributed system? `b]wyP  
(2)    What are the RPC stubs’ jobs? '3Q~y"C+4  
(3)    Why is important the load balancing for a distributed system? H(P]Z~et  
(4)    What are the differences among agent, broker and proxy? `]]<.>R  
(5)    What are the ACID features on the distributed transaction? Y6Cm PxOQ  
(6)    How many consistencies are there in data-centric consistency models? hliO/3g  
(7)    What’s the ‘happen-before’ relation?