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單項(xiàng)選擇題

The subnet mask on the serial interface of a router is expressed in binary as 11111000 for the last octet. How do you express the binary number 11111000 in decimal?（）

A. 210
B. 224
C. 240
D. 248
E. 252

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多項(xiàng)選擇題

You have the binary number 10011101. Convert it to its decimal and hexadecimal equivalents.（）

A. 158
B. 0x9D
C. 156
D. 157
E. 0x19
F. 0x9F

單項(xiàng)選擇題

If a host on a network has the address 172.16.45.14/30, what is the address of the subnetwork to which this host belongs?（）

A. 172.16.45.0
B. 172.16.45.4
C. 172.16.45.8
D. 172.16.45.12
E. 172.16.45.18

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