dig nslookup 回来都是问题包？这是怎么回事？

dig www.google.com +trace
;; Got bad packet: bad label type
34 bytes
5d b1 80 80 00 01 00 01 00 00 00 00 00 00 00 02 ]...............
00 01 c0 0c 00 01 00 01 00 00 00 01 00 04 00 00 ................
70 cf p.

dig www.google.com

; <<>> DiG 9.8.3-P1 <<>> www.google.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24726
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.google.com. IN A

;; ANSWER SECTION:
www.google.com. 1 IN A 0.0.113.35

;; Query time: 0 msec
;; SERVER: 192.168.199.1#53(192.168.199.1)
;; WHEN: Mon Sep 8 10:40:45 2014
;; MSG SIZE rcvd: 48

dig www.baidu.com +trace
;; Got bad packet: bad label type
34 bytes
47 7d 80 80 00 01 00 01 00 00 00 00 00 00 00 02 G}..............
00 01 c0 0c 00 01 00 01 00 00 00 01 00 04 00 00 ................
71 5c q\

ping baidu.com
PING baidu.com (0.0.113.100): 56 data bytes
ping: sendto: No route to host
ping: sendto: No route to host
Request timeout for icmp_seq 0
ping: sendto: No route to host

nslookup www.baidu.com
Server: 192.168.199.1
Address: 192.168.199.1#53

Non-authoritative answer:
Name: www.baidu.com
Address: 0.0.113.101

nslookup www.baidu.com 8.8.8.8
Server: 8.8.8.8
Address: 8.8.8.8#53

Non-authoritative answer:
Name: www.baidu.com
Address: 0.0.113.102

nslookup www.v2ex.com 114.114.114.114
Server: 114.114.114.114
Address: 114.114.114.114#53

Non-authoritative answer:
Name: www.v2ex.com
Address: 0.0.113.138

如上所示。使用 dig +vc 倒是可以正常解析的。但是我的电脑明明还可以正常浏览网页的呀……

还有件很疑惑的事情，昨晚我用 iPhone 连上 VPN 上了下 Google，然后断了 VPN，发现还是能轻松上 Google，无丢包卡顿感。一开始我以为是 DNS 缓存的问题，可奇葩的是 youtube.com/greatfire.org/facebook.com 都能上去，这些网站我连 VPN 期间也没上过额。去查了 IP，显示是我正常的国内 IP。一直到现在还能上的去。但是同处同一 WIFI 下的 Mac 就一切正常，上不去这些网站（但是遇到了上面奇葩的解析问题）。