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本帖最后由 Frank7258 于 20.12.2009 20:31 编辑 : ]. Z+ ^5 g1 E$ A
未必,视网络情况而定,自己ping一下就大概知道了: W+ i; ]4 y3 f l! I: R: L
Google或者Open DNS至少属于最可靠的DNS之列 .../ Y0 R& ?- C+ [* l+ K8 ^: {2 A# i
fuchs 发表于 20/12/2009 00:09 ![]()
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这个速度差距还是比较明显的:4 G$ O* P+ i: G0 c- q
9 ^9 M) k# ~/ A" W: c+ Z1 o3 m$ c% h: Hping LRZ网内的DNS:7 h/ S6 B* h8 z: w6 u
kan@kan-laptop:~$ ping 10.149.64.2 -c 5, n& Q- V y0 t' M4 w
PING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.* j% f9 i3 K! `
64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms& `* p! k" G: k
64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms
6 I7 c$ Q3 _' {% i+ F/ i, R6 D64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms# [ v/ L: W1 T9 ]7 y" u/ x0 {3 J
64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms
$ K# [5 u( c; l64 bytes from 10.149.64.2: icmp_seq=5 ttl=62 time=0.522 ms
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--- 10.149.64.2 ping statistics ---
4 v3 a' C! N. M0 z" R5 packets transmitted, 5 received, 0% packet loss, time 4004ms
, l% C0 B3 }. E+ E- wrtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms
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0 ]) K X2 E+ j8 N& {ping Google DNS:
- D3 D$ s) _' M- c' E1 tkan@kan-laptop:~$ ping 8.8.8.8 -c 5
5 A* `: t ?/ O3 A$ fPING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
7 w6 ~* Z/ \5 [# M; o3 a) U, ^64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms! Q& W2 R1 V8 l! a' T
64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms4 F, B5 R9 r1 E: @
64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms- Z" `3 |+ |' H' a& ?) r& ~
64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms, ]" I! U/ C' }1 b8 V. `# J" L# }' B
64 bytes from 8.8.8.8: icmp_seq=5 ttl=241 time=15.2 ms
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; `3 p9 A. |9 u0 |: f" }--- 8.8.8.8 ping statistics ---# v) R3 q+ @( w" P8 x2 \3 i& N4 }; H
5 packets transmitted, 5 received, 0% packet loss, time 4006ms3 `; N7 p" B% ?- c
rtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms / k- O0 x% D$ D8 \0 O/ n
2 Q2 f% I# o0 Z, C etraceroute 8.8.8.8# q3 U: l" Y) v, R# x
kan@kan-laptop:~$ sudo tracert 8.8.8.8
' z0 x: d6 S' |8 D; ^. straceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
2 {7 P6 d% C6 A0 P* x 1 10.149.71.86 (10.149.71.86) 6.920 ms 6.918 ms *3 B' f! g# j, ^
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( |1 t- ?" g6 z; f 6 * natomat1-int.lrz-muenchen.de (138.246.99.4) 3.815 ms 3.650 ms0 \" A L Q) t7 Z0 Z( A
7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms
$ g7 R1 B2 X$ ? 8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms *
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10 * * *
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14 google-public-dns-a.google.com (8.8.8.8) 14.428 ms 13.395 ms 14.635 ms |
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