|
本帖最后由 Frank7258 于 20.12.2009 20:31 编辑 : r& A j9 h/ F8 S- G
未必,视网络情况而定,自己ping一下就大概知道了
" o# L0 C* f2 LGoogle或者Open DNS至少属于最可靠的DNS之列 ...+ g6 K$ H3 r8 v: f0 V+ p
fuchs 发表于 20/12/2009 00:09
8 V' `- k9 @+ b7 L" P9 [& Y* k4 e( H* n3 ]1 ]0 z2 m# t7 z( |3 D
3 N" W% |5 D% O: ?) Q# f8 m
这个速度差距还是比较明显的:
9 b5 J, c) b* p+ h; e9 i6 j* A+ Q( H* s
ping LRZ网内的DNS:
# Q+ Z' W& _3 H6 Rkan@kan-laptop:~$ ping 10.149.64.2 -c 5
$ A1 \6 m: u) ]3 \: j0 q. u. ]; APING 10.149.64.2 (10.149.64.2) 56(84) bytes of data.! h8 ?+ c% d5 X
64 bytes from 10.149.64.2: icmp_seq=1 ttl=62 time=0.497 ms
9 n( g2 e" B, e6 c% |$ z; Y64 bytes from 10.149.64.2: icmp_seq=2 ttl=62 time=0.379 ms# b4 c, E& }2 J( V6 b
64 bytes from 10.149.64.2: icmp_seq=3 ttl=62 time=0.337 ms
+ m3 R, w' R& m1 C& s64 bytes from 10.149.64.2: icmp_seq=4 ttl=62 time=0.380 ms; ?% ~% }$ X! S! {
64 bytes from 10.149.64.2: icmp_seq=5 ttl=62 time=0.522 ms$ L6 C0 l3 C# U
$ B3 i9 u4 |0 ] n
2 _0 H9 r7 q9 E--- 10.149.64.2 ping statistics ---
" c M8 i: y% _5 packets transmitted, 5 received, 0% packet loss, time 4004ms
( N9 k! S v4 I5 ?5 k$ N+ f+ c! `rtt min/avg/max/mdev = 0.337/0.423/0.522/0.072 ms
9 r0 R: Z1 ~# T; ^: N& z6 q! }4 M
0 h+ ^/ d* X# l, E" d' u- A3 Q+ g) P
ping Google DNS:3 b: W" ^& [1 m! V; F' Z0 C" U
kan@kan-laptop:~$ ping 8.8.8.8 -c 5 Q) b* }8 y3 W. g' M3 B! H- g* F
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
& s+ N7 E& Y/ e9 d- e1 B64 bytes from 8.8.8.8: icmp_seq=1 ttl=241 time=15.7 ms
3 k3 d U* r6 j8 a64 bytes from 8.8.8.8: icmp_seq=2 ttl=241 time=21.0 ms& b# L$ Y) E, c; z
64 bytes from 8.8.8.8: icmp_seq=3 ttl=241 time=19.6 ms
7 { Q6 G5 V7 E9 K64 bytes from 8.8.8.8: icmp_seq=4 ttl=241 time=18.7 ms) x% j9 f" q+ a2 e
64 bytes from 8.8.8.8: icmp_seq=5 ttl=241 time=15.2 ms
- Z) }# @3 s8 k9 K" C, M* X7 b3 Y( x! e) b2 ]
--- 8.8.8.8 ping statistics ---" x+ o$ S Q- C6 u; c1 }
5 packets transmitted, 5 received, 0% packet loss, time 4006ms
6 x ]! m- N* B6 r% [rtt min/avg/max/mdev = 15.253/18.097/21.016/2.232 ms 4 U9 o: H( Z8 @7 E" u( s6 T$ S
" v. r! Q- \. z) ~) E
traceroute 8.8.8.80 x: }' y& w# g* h! Y
kan@kan-laptop:~$ sudo tracert 8.8.8.80 D( U1 n6 c9 q& w
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
3 |& y4 Y# Z9 E" w4 r 1 10.149.71.86 (10.149.71.86) 6.920 ms 6.918 ms *
: F5 B" Y4 r0 x- _% \9 u8 C 2 * * *
0 \! }0 L9 F% O) k; d8 S 3 * * *
& e$ G2 B% i( p* e- Q. T 4 * * *
. @: T9 \% y/ [5 l8 O- u+ o 5 * * *
! A: l6 J# G3 ~; ~/ C3 i: h' _: i) S 6 * natomat1-int.lrz-muenchen.de (138.246.99.4) 3.815 ms 3.650 ms. N) N3 {4 p5 b8 r* }
7 vl-392.csr1-2wr.lrz-muenchen.de (138.246.99.29) 4.096 ms 4.117 ms 4.115 ms, ]3 X- S; g( c0 M5 ?
8 xr-gar1-te1-3-147.x-win.dfn.de (188.1.37.89) 4.806 ms 5.039 ms *
) L& {8 H1 M# V0 E 9 * * *) {8 z: H% b$ K f# j
10 * * ** Y: w" ^% w! f- |. R
11 * * *1 e4 O0 C8 W3 V* |2 k6 a
12 * * *
6 H- x. E/ B1 c4 \13 * * *) \6 B% d0 c1 W
14 google-public-dns-a.google.com (8.8.8.8) 14.428 ms 13.395 ms 14.635 ms |
|