|
本帖最后由 Frank7258 于 20.12.2009 20:31 编辑 ) r; a- t9 I* Q8 T' u5 D; ?
未必,视网络情况而定,自己ping一下就大概知道了
% v2 G t2 t- a" e1 ~4 _Google或者Open DNS至少属于最可靠的DNS之列 ...
! x/ m& c. \$ c7 Z* d" F* Jfuchs 发表于 20/12/2009 00:09 ![]()
- b4 q! H2 V `" d8 o v% Q0 B; [) G `" I5 N- i
9 ]* U0 I: q7 L2 ^7 E$ S
这个速度差距还是比较明显的:* N/ p' C* U6 ]$ s6 W
, l0 G5 o! Q0 L* }3 @+ L" C4 M" yping LRZ网内的DNS:
3 C/ C, L% t" O+ a; @kan@kan-laptop:~$ ping 10.149.64.2 -c 5
U( I* x" P" O: L" h1 nPING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.
- ]2 T' R$ o: Q7 Z8 J c( x64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms
/ d, _ H3 ?& S5 ?" G) b) ~64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms
: w, n" v' Q/ J3 v64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms
( E! E! h0 f. W0 D3 g3 E64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms2 e- r" S5 S1 @
64 bytes from 10.149.64.2: icmp_seq=5 ttl=62 time=0.522 ms
0 N- d0 O5 f! K! `9 D0 H8 ^4 s2 r* R8 S6 w4 v
$ q. f* n8 v7 H. t
--- 10.149.64.2 ping statistics ---4 J. h: K4 A% M w) v- y p6 v
5 packets transmitted, 5 received, 0% packet loss, time 4004ms
6 O1 t4 F$ _$ Crtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms
. b; n; H! A6 m- M* R3 h. E1 {& y: ^
- ^8 \" X; l4 eping Google DNS:0 s8 T6 A& O8 N. W7 `6 C& G+ s ^
kan@kan-laptop:~$ ping 8.8.8.8 -c 5
+ {" O' R" p4 S, L6 ^7 [: u! |PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.$ t- h5 i7 v# P% J
64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms/ g9 C9 V& r! }
64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms" o' L, z4 R: p4 N. @% r+ Y
64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms8 d3 R1 v' g+ T, n5 I+ v
64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms
( M+ e# H9 w& s4 x1 M( g9 b64 bytes from 8.8.8.8: icmp_seq=5 ttl=241 time=15.2 ms
; {, l, r. b4 I* t, `- X0 K
7 w; Y2 C' Y$ }* H# g--- 8.8.8.8 ping statistics ---, b6 h+ z% {# O& P* z! ~
5 packets transmitted, 5 received, 0% packet loss, time 4006ms3 ^* f+ w# p2 w
rtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms
* ]: b, w, M; t# v W3 L+ P2 g6 c( o4 s
traceroute 8.8.8.8
5 F2 g% y/ x3 \5 W2 qkan@kan-laptop:~$ sudo tracert 8.8.8.8, _& V0 a3 x7 T. i. ~ N) ]' c
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets. ~; I, Q; b; V( O
1 10.149.71.86 (10.149.71.86) 6.920 ms 6.918 ms *: g* c, y8 |2 b2 H
2 * * *4 V. k; G' G2 G
3 * * *
3 ?# `9 u- _. u0 w 4 * * *
. u8 n6 [. |! `# o 5 * * *
5 `( K/ N0 {+ _7 Z8 T9 i/ P" [ 6 * natomat1-int.lrz-muenchen.de (138.246.99.4) 3.815 ms 3.650 ms
" t! w+ ]* N- B/ N0 o2 Q 7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms0 V& T6 D" P, X0 D4 R0 |. E+ F7 s
8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms *
. k6 H5 f/ ~" S. n. y) `$ G 9 * * *' R, V! N) q2 K7 _) {
10 * * *$ h7 q2 f' u4 [4 ]* R0 t+ w' Z. g
11 * * *# [- ]; _- ^5 U' X4 h3 i O
12 * * *
+ Z* K) B' T& B& W0 W/ J13 * * *
6 E3 f, y! f7 K+ z+ H1 M" v; d7 |14 google-public-dns-a.google.com (8.8.8.8) 14.428 ms 13.395 ms 14.635 ms |
|