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本帖最后由 Frank7258 于 20.12.2009 20:31 编辑
: M6 \. \( D% R+ R" Q" _, ~7 ?' G未必,视网络情况而定,自己ping一下就大概知道了
4 ?0 @2 l6 S; W* t0 WGoogle或者Open DNS至少属于最可靠的DNS之列 ...: h9 Y* K/ a: v+ v: D% ^
fuchs 发表于 20/12/2009 00:09 ![]() " z2 q0 p# a8 [; N% r3 T7 |
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0 U! k1 T) z% c* I7 @) V+ p& B9 _! p2 T这个速度差距还是比较明显的:0 h# V/ S+ `. Q5 I" T
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ping LRZ网内的DNS:+ A: s* ?8 k) D2 g7 r/ y* U$ g9 K
kan@kan-laptop:~$ ping 10.149.64.2 -c 5
$ I2 O- {5 W- C. hPING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.# K/ [( f# F* S" f8 J
64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms
6 X8 v# H6 W" e! J9 c: p) f% i64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms
7 a. g+ t, x( y& V64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms+ m/ y1 i5 P7 m: R9 U
64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms A% @( `- ~" `3 k4 y, M" X6 {
64 bytes from 10.149.64.2: icmp_seq=5 ttl=62 time=0.522 ms
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: `1 O9 O( W+ D- k+ Z--- 10.149.64.2 ping statistics ---
* B$ @6 E; S! P5 packets transmitted, 5 received, 0% packet loss, time 4004ms
) ]: n5 Q4 I( wrtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms Y3 H! t0 x+ ^& j |* w' U) {, z
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ping Google DNS:$ j7 s+ y- `3 C) c9 `' j
kan@kan-laptop:~$ ping 8.8.8.8 -c 5
$ K! w. t1 \3 Y( yPING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
1 P) K9 o; Q6 ]9 q64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms8 U* h6 U5 i% t9 r
64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms
5 g5 j5 e; S- S% d8 @6 G- L, Q64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms
# f% D% l6 e3 C+ g4 e) {64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms
9 i& o0 N& J: x64 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 ---
' m, ]7 T ?" x( ^5 S" g& z5 packets transmitted, 5 received, 0% packet loss, time 4006ms2 k5 S* p: q- Y5 C: S
rtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms
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5 S2 \' @+ j! I7 K8 n9 otraceroute 8.8.8.8
5 z# \4 ~. P. Y) x/ i, _7 v; _3 e9 ekan@kan-laptop:~$ sudo tracert 8.8.8.8
6 c/ v Z* \4 |* @traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets% [2 T: |/ j" E0 t( L+ U
1 10.149.71.86 (10.149.71.86) 6.920 ms 6.918 ms *; p5 _, B6 p2 M4 m% x( r! K& _
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6 * natomat1-int.lrz-muenchen.de (138.246.99.4) 3.815 ms 3.650 ms5 U# ]3 x( [: T- U+ F- m# F6 g
7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms
; J# }+ c" R+ ~4 V8 ^2 O 8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms *5 }8 n- |! f9 k7 i f) Q) w
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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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