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本帖最后由 Frank7258 于 20.12.2009 20:31 编辑 ' q( {: n, O' @/ l; y9 m
未必,视网络情况而定,自己ping一下就大概知道了# Z: w" ~& L5 k7 X: V
Google或者Open DNS至少属于最可靠的DNS之列 ...
; t f; R' \2 K1 l A" yfuchs 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:
; M" M! Z* W$ i" t) v3 O/ J% bkan@kan-laptop:~$ ping 10.149.64.2 -c 5
. h$ h8 k. t! p2 L) A2 APING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.
0 L6 m; s2 v1 n64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms% h+ A9 N8 S2 M" n
64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms' A0 K& h- }4 D% X3 P5 o6 X3 k2 ^
64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms
6 q! P) O5 g, i$ O; ^64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms
! x0 s, _: O2 Y3 ?+ [64 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 ---
7 |. K6 L* s5 p1 E; \; W: g7 b8 o5 packets transmitted, 5 received, 0% packet loss, time 4004ms6 J4 [& _: P& B4 [9 y( ^
rtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms ( l& `9 v5 s) j. x- z: |1 u
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: }9 a: L& p" q! O- m0 |ping Google DNS:7 w k- L; N9 J9 h0 A* b& V
kan@kan-laptop:~$ ping 8.8.8.8 -c 58 `0 C+ v+ ?( j5 P" B2 ^
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.: Z5 N- \; U0 s3 L W9 \; z8 e
64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms; n9 ~. n2 z# ~3 Y
64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms
8 q* Y! o# X9 L3 ~8 O64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms
4 i; ?% Z" \( ^2 }1 Q' ^" g64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms
" X3 M9 g% P: p5 V64 bytes from 8.8.8.8: icmp_seq=5 ttl=241 time=15.2 ms
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--- 8.8.8.8 ping statistics ---
6 x; U+ o9 X& r8 M" o! `0 A5 packets transmitted, 5 received, 0% packet loss, time 4006ms
/ O4 k" }) l9 T2 U2 Qrtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms 5 u; f! K' G+ B. T: u4 c: B) A
" Z# s: `$ [! w$ L! @# U/ ptraceroute 8.8.8.8
6 ^' }# }# S0 K4 Q% {( akan@kan-laptop:~$ sudo tracert 8.8.8.8- N8 a" z( e }& G& Z. i
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
: u7 M% M |2 x2 p9 O+ ?+ w2 N 1 10.149.71.86 (10.149.71.86) 6.920 ms 6.918 ms *' {3 L) I7 Y, h& g
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6 * natomat1-int.lrz-muenchen.de (138.246.99.4) 3.815 ms 3.650 ms0 p! T1 f4 Y/ L4 `9 l6 L, J
7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms
$ k+ K: o6 I7 H D8 N 8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms */ e: t$ L- C F/ `+ ?8 y
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5 t$ @% q1 @' D1 p8 z/ u14 google-public-dns-a.google.com (8.8.8.8) 14.428 ms 13.395 ms 14.635 ms |
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