单项选择题
A.10010010 B.10011001 C.10101100 D.10101110
How would the number 231 be expressed as a binary numbe...
单项选择题How would the number 231 be expressed as a binary number?（）
A. 11011011 B. 11110011 C. 11100111 D. 11111001 E. 11010011
Which one of the binary number ranges shown below corre...
单项选择题Which one of the binary number ranges shown below corresponds to the value of the first octet in Class B address range?（）
A. 10000000-11101111 B. 11000000-11101111 C. 10000000-10111111 D. 10000000-11111111 E. 11000000-10111111
The subnet mask on the serial interface of a router is ...
单项选择题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
