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本帖最后由 Frank7258 于 20.12.2009 20:31 编辑 & ?: `0 N9 Y" i7 K
未必,视网络情况而定,自己ping一下就大概知道了6 ^( a. G- Q; H8 ^
Google或者Open DNS至少属于最可靠的DNS之列 ...5 V }' o- T) G
fuchs 发表于 20/12/2009 00:09 ![]() - q' ]' y9 c6 z9 Z+ q- N3 A
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1 I8 q7 e/ \) y; g0 I这个速度差距还是比较明显的:
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ping LRZ网内的DNS:
! I1 V! H% q: R0 y# |0 t/ ]" _# o" Rkan@kan-laptop:~$ ping 10.149.64.2 -c 5
/ N1 Z# J, z0 z, ^PING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.
& d" K8 G1 Z4 x3 x. k, @; I64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms; r) {5 `" b$ }; I9 @! y
64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms: m6 z2 O- i+ {6 S: L
64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms; c/ G( V+ V; W: p# ^
64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms0 j$ v4 g: Z$ @( t0 V
64 bytes from 10.149.64.2: icmp_seq=5 ttl=62 time=0.522 ms# F' Y; r/ ~1 R8 [& G6 S
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; C: r! t8 |; x, \2 r( `) W0 [--- 10.149.64.2 ping statistics ---
* f" Y4 [2 f0 u2 U& Y5 packets transmitted, 5 received, 0% packet loss, time 4004ms
2 ?9 |4 u- I# ?2 `# D; }rtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms 9 j8 ^7 A, e2 _7 ]8 K" X1 w3 J
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ping Google DNS:# i0 @& P# w, t
kan@kan-laptop:~$ ping 8.8.8.8 -c 51 q8 u: [& D8 r: U. ^
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
$ ~) J: w; x% Z' O! x64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms
2 ?- ^/ a5 d3 v3 e4 d* r& L64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms; b' s5 t% y# s
64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms
7 s" x( a/ m8 ]) U+ \: T64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms2 Q* L( e3 M' t5 K3 R. z) `: B2 N# I
64 bytes from 8.8.8.8: icmp_seq=5 ttl=241 time=15.2 ms
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9 D5 {) m1 v7 j: W/ F: X--- 8.8.8.8 ping statistics --- R9 S# H8 C" x! j/ A% R
5 packets transmitted, 5 received, 0% packet loss, time 4006ms
7 u8 o# P8 P* e. y& Mrtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms # w$ j7 j6 N/ R& |/ X
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traceroute 8.8.8.8
- d# s0 B& g8 R3 v8 Pkan@kan-laptop:~$ sudo tracert 8.8.8.8
: f4 g: T* j2 e: H' Ntraceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets' m4 {# c) B* c6 Q- Q9 d( g
1 10.149.71.86 (10.149.71.86) 6.920 ms 6.918 ms *9 ~* x" c6 {- F; L
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- y9 ^4 j5 Q" U/ [+ c 6 * natomat1-int.lrz-muenchen.de (138.246.99.4) 3.815 ms 3.650 ms- g x6 e& d. [; ^* d% o" V
7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms
( w& x+ \% x$ d* V$ _# s, q% A 8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms *& `" |( B; }9 H" }/ b6 I- I5 I
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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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