Can anyone explain the answer to this Boson ICND2 question, the question states:
An engineer has implemented manual route summarisation with EIGRP in which the one summary route is 172.16.128.0/19. Another engineer needs to install a new VLAN & subnet. The following are some of the subnet numbers being considered by the second engineer for the new subnet. Which one lists a subnet that would not be represented as part of the existing summary route?
A. 172.16.144.0/28
B. 172.16.164.160/28
C. 172.16.180.0/28
D. 172.16.124.0/28
E. 172.16.152.128/28
The answers are B & C but D also does not overlap? The explanation states that the summary route represents the following range of numbers:
172.16.128.0 - 172.16.159.255
The answers represent:
172.16.144.0/28: 172.16.144.0 - 172.16.144.15
172.16.152.128/28: 172.16.152.128 - 172.16.152.143
172.16.164.160/28: 172.16.164.160 - 172.16.164.175
172.16.180.0/28: 172.16.180.0 - 172.16.180.15
172.16.124.0/28: 172.16.124.0 - 172.16.124.15
What am I missing?