70-291 Question about a Case Study in the Microsoft book

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Hello,

Chapter 2 Case study.
Question 2. The answer is supposably that the subnet mask is set wrongly and should be /28. Wellll why? Ok maybe to make smaller segments and conserve addresses but one second! The /29 fits with the addresses givern aswell. Got question 1 and 3 correct but the answer for 2 confused me.

Hope someone can remember it,

cheers!

p.s. maybe doing the whoel of chapter 2 in one sitting isnt the best of ideas to keep a stable mind...

 

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Ur right. the only explanation is that subnets suppose to be contiguous. if you gonna use /29 ur missing out one subnet. in case that all other subnets are bigger that 8 you are unable to use 192.168.1.168/29.
that just my quick check. let me know whats ur thoughts.