How network manager is resolving localhost without /etc/hosts

[Shashwat Kumar]

I tried to make a new mapping in /etc/hosts which didn't work. After
searching I found that network-manager does not use /etc/hosts but dnsmasq is
used as local dns resolver.

To confirm this design, I commented every line in /etc/hosts and flush
dnsmasq cache using

sudo /etc/init.d/nscd restart

and restarted network-manager

sudo service network-manager restart

But to my surprise ping localhost was still resolving to 127.0.0.1. As per
my knowledge localhost mapping is only maintained in /etc/hosts. So how
localhost was still being resolved? Is there any information that I am
missing?

Thanks in advance.
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