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

Question No. 246

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 ______.

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.