CCNA题库222 Subnet切割疑问

UID: 102007

The ip subnet zero command is not configured on a router. What would be the IP address of Ethernet0/0
using the first available address from the sixth subnet of the network 192.168.8.0/29?
A. 192.168.8.25
B. 192.168.8.41
C. 192.168.8.49
D. 192.168.8.113
Answer: C
Section: Chapter 3: IP Addressing and VLSM
Explanation/Reference:
192.168.8.0/29的块大小为8那么第六个subnet则为6*8=48第一个可用地址则为192.168.8.49

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/29的块不是应该是
0-7
8-15
16-23
24-31
32-39
40-47
48-55
那first available address from the sixth subnet 不是应该是192.168.8.41吗?怎变成49了?

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