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本帖最后由 Frank7258 于 20.12.2009 20:31 编辑
: K& D9 J/ ?% V8 l) A q未必,视网络情况而定,自己ping一下就大概知道了
6 E" n1 N1 x. O ?! K* kGoogle或者Open DNS至少属于最可靠的DNS之列 ...9 i7 ~: U" ?9 E' k7 F
fuchs 发表于 20/12/2009 00:09 ![]() ' t5 n! M7 r- p
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这个速度差距还是比较明显的:5 Y. K3 j4 Q9 E) `
$ t$ u$ O+ Q1 f- B" z7 tping LRZ网内的DNS:
" N/ U b1 V8 l3 W7 x8 E0 A8 ^kan@kan-laptop:~$ ping 10.149.64.2 -c 5% u+ v6 K4 p3 ?1 ?& [
PING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.
5 a6 I; D5 Y9 e5 [64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms
$ l6 O9 ]) s" |1 b$ l64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms; Q) i; ~3 K2 K. Q2 z
64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms( C& f9 |, l5 O$ K3 H2 v
64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms
8 o3 B+ Q. ]( K7 e) Y- d64 bytes from 10.149.64.2: icmp_seq=5 ttl=62 time=0.522 ms. ~! E3 B; I4 r1 t& v. f6 g
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( `# B/ g% [0 G+ N- {' ?--- 10.149.64.2 ping statistics ---1 A" s) D, e. o; j
5 packets transmitted, 5 received, 0% packet loss, time 4004ms
$ c: B `# M8 F- ^* Mrtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms n& f& c* j5 r# F7 E1 `1 r2 y) C
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4 O& `* g" n! o! `3 T. X2 cping Google DNS:) v+ E I0 H, [& _/ {( m' d
kan@kan-laptop:~$ ping 8.8.8.8 -c 5* e$ T2 o3 V2 T# |( C
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.! V* h& l. u. c5 \
64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms: \) I; V, A) R3 g. s- q4 K
64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms
T' a/ g6 h8 j64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms* S, m0 i, B" i/ m) k# T
64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms& {5 k" M. `% Z L
64 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 ---% n3 y) i. S( H* `) G# x: E+ J7 W/ ?
5 packets transmitted, 5 received, 0% packet loss, time 4006ms1 Q/ C$ p, G6 e/ W8 m9 Q
rtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms
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& @# Q7 Q* g2 x( gtraceroute 8.8.8.8% F, `6 r0 [! |! h" L: M
kan@kan-laptop:~$ sudo tracert 8.8.8.82 Q( h; X% A, U! _; G, P& q
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets# ]$ I, U0 ]- R) ]
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% s; B5 m3 d. O6 e. p! Z
7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms
2 c. F, V4 i( q6 d1 L+ }4 l( y6 Y 8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms *9 s. Q+ U2 _$ h
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: x% A4 a& E. i8 {$ x14 google-public-dns-a.google.com (8.8.8.8) 14.428 ms 13.395 ms 14.635 ms |
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