[CCCure CISSP] Access control ?

[onaser525 at gmail.com]

I'm reading about physical and technical controls and in more detail about network segregation and network architecture. 
In the Shon Harris book its says both can be carried out logical controls how would you differ if it was on a test and they ask you "which access control would be used if your protecting your network logically?" what would be the right answer?
 They might not ask that but you never know. 

Thanks 
Omar 
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