shell:$ nslookup -timeout=2 -retry=1 'speedtest2.vtn.com.vn'
;; communications error to 1.1.1.1#53: timed out
Server:		8.8.8.8
Address:	8.8.8.8#53

Non-authoritative answer:
Name:	speedtest2.vtn.com.vn
Address: 113.164.24.102
Name:	speedtest2.vtn.com.vn
Address: 2001:ee0:2f06:9::a