ip address

logistic_guy

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If an Ethernet port on a router were assigned an IP address of 172.16.112.1/25\displaystyle 172.16.112.1/25, what would be the valid subnet address of this interface?

A. 172.16.112.0\displaystyle \bold{A.} \ 172.16.112.0
B. 172.16.0.0\displaystyle \bold{B.} \ 172.16.0.0
C. 172.16.96.0\displaystyle \bold{C.} \ 172.16.96.0
D. 172.16.255.0\displaystyle \bold{D.} \ 172.16.255.0
E. 172.16.128.0\displaystyle \bold{E.} \ 172.16.128.0
 
If an Ethernet port on a router were assigned an IP address of 172.16.112.1/25\displaystyle 172.16.112.1/25, what would be the valid subnet address of this interface?

A. 172.16.112.0\displaystyle \bold{A.} \ 172.16.112.0
B. 172.16.0.0\displaystyle \bold{B.} \ 172.16.0.0
C. 172.16.96.0\displaystyle \bold{C.} \ 172.16.96.0
D. 172.16.255.0\displaystyle \bold{D.} \ 172.16.255.0
E. 172.16.128.0\displaystyle \bold{E.} \ 172.16.128.0
Is this an assignment from an instructional class?

Please provide a copy of your attempts to solve it - and indicate where you are stuck.
 
Thank you a lot professor khan for passing by. The IP address is my game. It is just that I was touring the United States in the last two months and had not practised anything. I am not a Genius like you, so I forgot some stuff. This problem can be solved easily if my 1000\displaystyle 1000 posts were not deleted as they were my references.

Is this an assignment from an instructional class?
I don't think so.

Please provide a copy of your attempts to solve it - and indicate where you are stuck.
Give me back my references, and you will be surprised by my attempt. I am sure that you know it is very boring to reinvent the wheel. I just need to take a look at my references for 1\displaystyle 1 second to remember the strategy of how to attack this problem. However, my intuition tells me that the answer is A\displaystyle \bold{A}.
 
@khansaheb

Suppose you have a network consists of three computers and they have the following IPs:

172.16.112.1\displaystyle 172.16.112.1
172.16.112.2\displaystyle 172.16.112.2
172.16.112.3\displaystyle 172.16.112.3

It makes sense that the network address is 172.16.112.0\displaystyle 172.16.112.0. The multiple choice answers are tricky because each one of them is a valid network address in class B\displaystyle \text{B} but the ip address 172.16.112.1\displaystyle 172.16.112.1 can lie only within the network address 172.16.112.0\displaystyle 172.16.112.0.
 
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