GATE Papers >> CSE >> 2015 >> Question No 246

Question No. 246 CSE | GATE 2015

In the network 200.10.11.144/27, the fourth octet (in decimal) of the last IP address of the network which can be assigned to a host is ______.


Answer : 158


Solution of Question No 246 of GATE 2015 CSE Paper

200.10.11.144/27

255.255.255.224

                        224 → $ \underbrace{111}00000 $

                        144 → $ \underbrace{100}10000 $

                                      N/w ID.

                   First IP → $ \underbrace{100}00001 $

                     $ \vdots $

                   Last IP → $ \underbrace{100}\;11110 $

i.e., last IP is 200.10.11.158

$ \therefore $  158 is the fourth octet of the last IP address.

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