shell:$ nslookup -timeout=2 -retry=1 'kakao.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	kakao.com
Address: 211.242.11.41
Name:	kakao.com
Address: 211.249.251.46
Name:	kakao.com
Address: 121.53.93.60