单项选择题

Each host or router on the Internet has its own IP address. There are four IP addresses as followings. Which IP address is erronedus

A．189.132.2.1
B．255.255.255.0
C．198.73.265.50
D．192.0.0.3
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单项选择题
What binary number is encoded with Differential Manchester in the diagram below
A．10110011100
B．11001100011
C．11000110010
D．00111001101
单项选择题
There are two common types in page replacement algorithm: stack and non-stack strategies. When a real page number increase only stack algorithm can increase the hit rate monotonously. In the following replacement algorithm, which one belongs to non-stack strategy
A．FIFO
B．LRU
C．PFF
D．OPT
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