shell:$ nslookup -timeout=2 -retry=1 'down-update.qq.com'
;; communications error to 75.98.161.224#53: timed out
Server:		69.39.86.5
Address:	69.39.86.5#53

Non-authoritative answer:
down-update.qq.com	canonical name = downupdate.lmtlego.sched.apdcdn.com.
Name:	downupdate.lmtlego.sched.apdcdn.com
Address: 43.152.182.20
Name:	downupdate.lmtlego.sched.apdcdn.com
Address: 43.152.135.225
Name:	downupdate.lmtlego.sched.apdcdn.com
Address: 43.152.182.65
Name:	downupdate.lmtlego.sched.apdcdn.com
Address: 211.152.148.221
Name:	downupdate.lmtlego.sched.apdcdn.com
Address: 43.152.2.162
Name:	downupdate.lmtlego.sched.apdcdn.com
Address: 101.33.21.193
Name:	downupdate.lmtlego.sched.apdcdn.com
Address: 43.152.182.24
Name:	downupdate.lmtlego.sched.apdcdn.com
Address: 43.159.77.140