南理工分布式系统复习题1

1.(21 pts) Please expand the following abbreviated words. 8ZCoc 5  
  RPC   TCP/IP DCE RMI IDL UDDI SOAP uP<0WCN  
,o^y`l  
2.(28 pts) Please give your explanations for the problems. eeHP&1= 7  
(1)    What are the transparencies of a distributed system? fM #7y [  
(2)    What are the RPC stubs’ jobs? `'\t$nU  
(3)    Why is important the load balancing for a distributed system? Mwf Oy@|N  
(4)    What are the differences among agent, broker and proxy? 5C"QE8R o  
(5)    What are the ACID features on the distributed transaction? _DrJVC~6@  
(6)    How many consistencies are there in data-centric consistency models? [HN|\afz  
(7)    What’s the ‘happen-before’ relation?