Node(21) DNS- lookup and resolve

resolve IP address:

example from node.js API

var dns = require('dns');dns.resolve4('www.google.com', function (err, addresses) {  if (err) throw err;  console.log('addresses: ' + JSON.stringify(addresses));  addresses.forEach(function (a) {    dns.reverse(a, function (err, domains) {      if (err) {        throw err;      }      console.log('reverse for ' + a + ': ' + JSON.stringify(domains));    });  });});

output:

lookup method - to get only one IP address.

dns.lookup('google.com', 4, function( e, a ){ console.log(a);});// 173.194.43.46