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本帖最后由 Frank7258 于 20.12.2009 20:31 编辑
2 j1 f9 ?' J+ w% C2 v& y+ c未必,视网络情况而定,自己ping一下就大概知道了, w7 `+ d" \' t4 x% D7 Z
Google或者Open DNS至少属于最可靠的DNS之列 ...& v4 k2 e$ o$ Y V( p% u6 ?0 F
fuchs 发表于 20/12/2009 00:09 ; H& r: R' _, _2 h! G5 b ]
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/ g" }5 R1 X% z5 R这个速度差距还是比较明显的:
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ping LRZ网内的DNS:
4 P7 {! H/ o, c0 n+ v; Gkan@kan-laptop:~$ ping 10.149.64.2 -c 5: |! M7 H* s0 V4 s6 A
PING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.
/ P$ z, n k) I& h" ]64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms: w+ y: R5 g7 b: n8 J2 u
64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms
, B. ~4 x! i$ S* M6 L, ]6 I8 a8 v64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms
8 R# L& q$ r" u8 S/ Q64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms
: l" F' [6 e7 X2 j( L64 bytes from 10.149.64.2: icmp_seq=5 ttl=62 time=0.522 ms* x0 a' o- J9 n$ I8 Y% V' T2 j
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; }) H# D* I9 q ^1 p3 O--- 10.149.64.2 ping statistics ---& N+ d6 Y5 W+ k# O7 K5 ]( z# G7 O
5 packets transmitted, 5 received, 0% packet loss, time 4004ms T( D. P9 _9 L
rtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms
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ping Google DNS:6 S; i0 ?- u6 J( g
kan@kan-laptop:~$ ping 8.8.8.8 -c 5& l9 X, K# \) C, T: k1 M
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
O2 k- ~2 r! m5 D# \$ o1 n: s3 [64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms3 U' i8 O# N9 i/ r8 C! U
64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms
/ Y* G6 s. U8 U% L9 L: ^64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms
& R' p6 {- G* j# v* I6 x0 F: s64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms9 r. A- A; Y5 q& H/ x$ Q
64 bytes from 8.8.8.8: icmp_seq=5 ttl=241 time=15.2 ms1 _5 e7 R" W+ D
* |' h0 o; [$ I/ F y) `, @--- 8.8.8.8 ping statistics ---
: _3 _+ ^) g8 W# }$ O" |5 packets transmitted, 5 received, 0% packet loss, time 4006ms' O0 L& ^- V2 Y4 _- B# E6 E) w
rtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms / x: x6 y1 @" |- M' S6 K) C' S i
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traceroute 8.8.8.8
) c! G/ S% z# `* gkan@kan-laptop:~$ sudo tracert 8.8.8.8
( Z$ _9 V( f" B; U9 [traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets' \5 ?8 D# C4 p% a& O
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* M' z2 x& D8 `7 g0 d) g! ~
7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms4 x; d) t' r! }
8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms *
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# }; z. i$ X* U! g' A8 S14 google-public-dns-a.google.com (8.8.8.8) 14.428 ms 13.395 ms 14.635 ms |
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