2. 计算机
  3. What is the subnet for the host IP address 201.100.5.68/28? A. 201.100.5.0 B. 201.100.5.32 C. 201.100.5.64 D. 201.100.5.65 E. 20

What is the subnet for the host IP address 201.100.5.68/28? A. 201.100.5.0 B. 201.100.5.32 C. 201.100.5.64 D. 201.100.5.65 E. 20

admin2009-05-19  56
问题 What is the subnet for the host IP address 201.100.5.68/28?
A. 201.100.5.0
B. 201.100.5.32
C. 201.100.5.64
D. 201.100.5.65
E. 201.100.5.31
F. 201.100.5.1
选项
答案C
解析 Explanation:
This question is much easier then it appears when you convert it to binary and do the Boolean operation as shown below:
IP address 201.100.5.68 = 11001001.01100100.00000101.01000100
/28 mask = 11111111.11111111.11111111.11000000
AND result = 11001001.01100100.00000101.01000000
AND in decimal= 200. 100. 5. 64
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