南理工分布式系统复习题1

1.(21 pts) Please expand the following abbreviated words. "](6lB1Oe  
  RPC   TCP/IP DCE RMI IDL UDDI SOAP >
:sUL<p  
>"X\>M`"  
2.(28 pts) Please give your explanations for the problems. q]&.#&h  
(1)    What are the transparencies of a distributed system? c2SC|s]  
(2)    What are the RPC stubs’ jobs? G1T^a>tj4  
(3)    Why is important the load balancing for a distributed system? 7J$b$P0}  
(4)    What are the differences among agent, broker and proxy? 1r[@(c0  
(5)    What are the ACID features on the distributed transaction? m8]?hJY3l  
(6)    How many consistencies are there in data-centric consistency models? ~!6K]hB4  
(7)    What’s the ‘happen-before’ relation?