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本帖最后由 Frank7258 于 20.12.2009 20:31 编辑
9 m' o% A0 n* y9 h* i( ?5 b. k3 h未必,视网络情况而定,自己ping一下就大概知道了* X7 Z9 K# A% r6 P
Google或者Open DNS至少属于最可靠的DNS之列 ...6 b# a: y% {: h% I5 @
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:
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ping LRZ网内的DNS:
6 N0 k# S1 \8 d+ jkan@kan-laptop:~$ ping 10.149.64.2 -c 5
6 E' {; E) H7 r$ R: `PING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.8 {* C& C# Y5 a9 n9 W% H
64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms0 [7 P6 H- ^4 g" p
64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms
1 T, n) [$ O4 K" f4 I% g* D64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms
' K- B" W: K# j" i) D k! {) i64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms
/ R. H) Z( g9 A, z Z0 v64 bytes from 10.149.64.2: icmp_seq=5 ttl=62 time=0.522 ms+ I6 \4 _" K# G0 t
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1 ]; _8 g* |; V$ V--- 10.149.64.2 ping statistics ---! C4 l6 G- K$ ^ m2 u* s* }2 v9 W
5 packets transmitted, 5 received, 0% packet loss, time 4004ms* Z: D4 e9 b- ^. T$ @
rtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms & U6 t8 n3 ^4 T& n& d' I1 E
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& x$ [7 n1 ^; Fping Google DNS:6 M8 x6 T( k) p$ ?$ ?- U, e
kan@kan-laptop:~$ ping 8.8.8.8 -c 5
+ @" _" K# x2 O: b$ BPING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
0 H- M" n( h! ]. I: T, `64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms: D7 Y' a: F _4 H
64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms$ F, N& j2 F% j. C
64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms
2 W* k0 r- Z! `9 T7 \( i# m8 I4 ?64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms
- ]( j' }9 I& }- \7 l64 bytes from 8.8.8.8: icmp_seq=5 ttl=241 time=15.2 ms( q: v9 Q2 q8 w5 c. s# K; p
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--- 8.8.8.8 ping statistics ---
+ H$ ]- z8 N, ^( n$ k5 packets transmitted, 5 received, 0% packet loss, time 4006ms
5 @# P4 V, f lrtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms
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. R6 J0 _" e) O. e' Q) C) ]; ctraceroute 8.8.8.8
! i0 A" a- i2 M' F# H( V8 j* Fkan@kan-laptop:~$ sudo tracert 8.8.8.8) ?, ~, U8 c6 v% C
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets6 o+ u8 O; r G4 X$ b
1 10.149.71.86 (10.149.71.86) 6.920 ms 6.918 ms *
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0 _3 E, \. s6 m+ [# u 6 * natomat1-int.lrz-muenchen.de (138.246.99.4) 3.815 ms 3.650 ms
% V$ B, {: o5 q) Q9 o 7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms7 c0 W# `/ z$ j* S) U" r
8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms *
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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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