Networking - Networking Basics - Discussion

Here the subnet mask is 255.255.255.192 means only the last value is changing so subtract it from 255, you will get 64 means out of 255 IP's 64 is already used only 192 IP's are available.

256/4=64 means 0-63, 64-127, 128-191, 192-255 all 4 segments contains 64 IP's, out of which one segment is already used (lets not worry about it).

Now check the IP given which is 192. 168. 168. 188 which falls in the range 128-191 so here the valid host range will be from 129-190 because first one is always network IP, the last one is always the broadcast IP.

This value is right not wrong.
First of all we need to be the see the address and now.

We take broadcast address 256 then in this we subtract the value of last gourd subnet mask (192). Then we add the same bit of subtracting then we find the 128 also and then we re add the value (64) then we find out the 192 this will be the broadcast address of segment.

Why the value should be between 129 and 191. It should be between 128-191. Also why the broadcast address is 191?

Actually the value given is wrong. the value should be 192.168.168.128

then only we can get the correct value.

192-128=64

so that we can get 64 values.that valid host range value should be between 129 to 191.

i think correct answer is B.

does anybody refuse it....?

I didn't understand. Can anyone explain me clearly please?

I didn't understand, please. Can anyone explain clearly.