南理工分布式系统复习题1

1.(21 pts) Please expand the following abbreviated words. sY,q*}SLD  
  RPC   TCP/IP DCE RMI IDL UDDI SOAP Eo)w f=rE9  
Q(Uj5aX  
2.(28 pts) Please give your explanations for the problems. :"BZK5{8  
(1)    What are the transparencies of a distributed system? (KQAKEhD!  
(2)    What are the RPC stubs’ jobs? e+J|se
4L5  
(3)    Why is important the load balancing for a distributed system? _h;#\ )%~  
(4)    What are the differences among agent, broker and proxy? 0{u31#0j
 
(5)    What are the ACID features on the distributed transaction? }ti+tM*  
(6)    How many consistencies are there in data-centric consistency models? GMD>Ih.k:9  
(7)    What’s the ‘happen-before’ relation?