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本帖最后由 Frank7258 于 20.12.2009 20:31 编辑 + o: P4 W- V3 N5 f. E- B
未必,视网络情况而定,自己ping一下就大概知道了
9 P: L1 ?7 J; M7 l8 Q, H& |- f6 iGoogle或者Open DNS至少属于最可靠的DNS之列 ...- L6 B6 E. [8 ^3 K; a
fuchs 发表于 20/12/2009 00:09
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2 o4 r' t K2 l# z% V9 S这个速度差距还是比较明显的:
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ping LRZ网内的DNS:' t% D$ _7 f n+ ]" p4 j
kan@kan-laptop:~$ ping 10.149.64.2 -c 5: s7 {! ]. Y k$ K5 s
PING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.
2 j8 @- ^- r0 W1 i4 a- K64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms& D5 M, h- p& f* D5 O( Z
64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms
) x4 x0 I. y8 `, t; m4 V% f64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms! V3 \5 V- q4 D# G5 R4 A
64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms
t# L( D% N% `% X/ q' E- s3 r64 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 \- e+ q' c- u7 r4 c, J
5 packets transmitted, 5 received, 0% packet loss, time 4004ms, M% m7 [; a4 \0 j6 f, @% \& ?
rtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms
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" m* @$ B, L [: C" U% Sping Google DNS:2 o* M/ a0 o3 y* T3 r6 Z
kan@kan-laptop:~$ ping 8.8.8.8 -c 5. G/ f, d$ @& u" @
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
9 y2 B8 j% p- o64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms
, q9 Y/ u7 M5 o j64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms
2 G3 P; w. d _/ J. t$ ] o, j64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms
6 H, s% F k4 n! E64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms
8 G; f5 C7 b" C7 e64 bytes from 8.8.8.8: icmp_seq=5 ttl=241 time=15.2 ms; x% Y' f6 Y2 Z3 s N& t& f
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--- 8.8.8.8 ping statistics ---& V8 g' j5 r7 l2 A& Y* v
5 packets transmitted, 5 received, 0% packet loss, time 4006ms* N! Z7 f7 j1 q$ A3 r
rtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms
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: D7 s2 N* E# Y7 i3 J$ o% dtraceroute 8.8.8.8
# G; I* Q7 T# a/ \; e, n1 Skan@kan-laptop:~$ sudo tracert 8.8.8.8! `6 j R* u$ q# O! l) s
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
( y- m) V1 x6 q4 Y$ r2 b 1 10.149.71.86 (10.149.71.86) 6.920 ms 6.918 ms *
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6 * natomat1-int.lrz-muenchen.de (138.246.99.4) 3.815 ms 3.650 ms
, ^# X! N, {- U# i q: v, m 7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms/ Y1 O) j( s( Z2 {1 _% }
8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms *
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7 z" E4 L1 {0 R: S5 {$ S14 google-public-dns-a.google.com (8.8.8.8) 14.428 ms 13.395 ms 14.635 ms |
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