Your company is designing its public network. The network will use an IPv4 range of 131.107.40.0/22. The network must be configured as shown in the following exhibit.
You need to configure subnets for each segment.
Which network addresses should you assign?
A. Segment A: 131.107.40.0/23Segment B: 131.107.42.0/24Segment C: 131.107.43.0/25Segment D: 131.107.43.128/27
B. Segment A: 131.107.40.0/25Segment B: 131.107.40.128/26Segment C: 131.107.43.192/27Segment D: 131.107.43.224/30
C. Segment A: 131.107.40.0/23Segment B: 131.107.41.0/24Segment C: 131.107.41.128/25Segment D: 131.107.43.0/27
D. Segment A: 131.107.40.128/23Segment B: 131.107.43.0/24Segment C: 131.107.44.0/25Segment D: 131.107.44.128/27
正確答案為A，但請問一下，選項C是錯在那?為什麼錯?
子網路切割問題
2009-04-23 6:08 pm
回答 (1)
2009-04-25 5:55 am
✔ 最佳答案
For answer C, given segment A has network ID of 131.107.40.0 with netmask 255.255.253.0 and segment B has network ID of 131.107.41.0 with netmask 255.255.255.0.Consider the following IP address:
131.107.41.1
Using netmask of 255.255.253.0, it has a network ID of 131.107.40.0 and a host ID of 0.0.1.1
If you use netmaks of 255.255.255.0, it has a network ID of 131.107.41.0 and a host ID of 0.0.0.1
So, from the given segmenting method, you cannot tell which network this IP belongs to. Therefore, this subnetwork scheme will not work.
收錄日期: 2021-04-30 12:54:37
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