In the WAN, when a point-to-point subnet is used, an important design issue is the router interconnection

单项选择题Assume that N=2M and FIFO is used. If the string p1,p2,...,pN is repeated three times, then the number of page faults is

单项选择题设有关系R(A,B,C)，在下列的等式中，不成立的是