https://www.digitalocean.com/community/tutorials/how-to-configure-bind-as-a-private-network-dns-server-on-ubuntu-14-04
The material was read four times ,but i still can't set configuration in my status.

There is a mini home wifi network in my home.The wireless router is 192.168.1.1. Computer A is 192.168.1.2 ,the wordpress was build on it,and wireless router was connected to the Computer A .ALL the urls of my wordpress are the form of mywp.com/wp/?m=201409 ,there is a line in /etc/hosts of Computer A .

192.168.1.2 mywp.com

Computer B is 192.168.1.3, there is a line in /etc/hosts of Computer B also .

192.168.1.2 mywp.com

Now the wordpress can be visited when to input mywp.com/wp/?m=201409 in firefox both on Computer A and B. My android phone ip is 192.168.1.4 ,the wordpress can not be visited when to input mywp.com/wp/?m=201409 in my android's firefox .

I want to install bind9 to solve the problem.
problem 1:
which computer (A or B) will the bind9 be installed on ?
problem 2:
/etc/bind/named.conf.options
/etc/bind/named.conf.local
/etc/bind/zones/db.nyc3.example.com
/etc/bind/zones/db.10.128
How to set all the four files according to my status?