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本帖最后由 Frank7258 于 20.12.2009 20:31 编辑 4 t k% y4 B. @! O
未必,视网络情况而定,自己ping一下就大概知道了0 a& e% F4 s( g$ V# @2 i! m6 U
Google或者Open DNS至少属于最可靠的DNS之列 ...
! T' B. A5 b( \5 X0 M6 l0 ~" D, vfuchs 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:# M5 j# J8 N$ u. e7 y6 y
S7 `5 O* c' K0 c2 \1 _ping LRZ网内的DNS:+ m" U3 P, p; j9 J; h+ C
kan@kan-laptop:~$ ping 10.149.64.2 -c 5
. x: U7 \8 X) F) P; YPING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.
& t; l @5 V: j64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms4 p& k2 B) |6 P+ i' w+ ?, ~1 Y
64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms' k/ z" I( {2 K8 h0 y
64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms/ L8 r+ |8 R( w
64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms
! S( p/ d+ R; \64 bytes from 10.149.64.2: icmp_seq=5 ttl=62 time=0.522 ms% d3 S" c6 ]4 C; _
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--- 10.149.64.2 ping statistics --- ]# m& O, l5 c& x# ~ U- k
5 packets transmitted, 5 received, 0% packet loss, time 4004ms
9 d! W2 Z* R' V4 a2 Lrtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms
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ping Google DNS:" r, P# L% c @$ |; x
kan@kan-laptop:~$ ping 8.8.8.8 -c 5; |3 t8 z$ j4 n( s3 ~& E5 j
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
4 V' }6 i" e5 S" Q/ S2 M5 x$ N# K64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms; f% u {& ^7 F; `/ C$ M
64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms& _; i( t0 @1 p4 S7 V" k$ F d- Z
64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms3 A* a( `3 g2 b0 v
64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms
' l6 a4 }9 Y$ h2 P) w64 bytes from 8.8.8.8: icmp_seq=5 ttl=241 time=15.2 ms! Z, Y) X' o2 a3 v H! X
' }1 d$ w" G) \6 p* o6 y--- 8.8.8.8 ping statistics ---
. ^5 u2 h- Q7 p. d9 v' Q1 F5 packets transmitted, 5 received, 0% packet loss, time 4006ms: w5 @* D6 m$ X1 ?
rtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms 8 W: Q. j5 b# l5 M- |* a0 }7 G% n* M
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traceroute 8.8.8.83 g2 D( i! s6 ^' }
kan@kan-laptop:~$ sudo tracert 8.8.8.8
4 b1 |( n2 p6 _. |0 v( G' B8 n9 Ftraceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
7 a3 h. O6 D$ a9 P 1 10.149.71.86 (10.149.71.86) 6.920 ms 6.918 ms *% I# x7 V" l, p3 H) x9 Y
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6 * natomat1-int.lrz-muenchen.de (138.246.99.4) 3.815 ms 3.650 ms
6 ]/ k2 D! k' @- ^ 7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms
6 C$ H6 w# M3 z+ v 8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms *
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. h- m0 R% l7 m' @: C14 google-public-dns-a.google.com (8.8.8.8) 14.428 ms 13.395 ms 14.635 ms |
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