今天闲的时候trace route了yahoo和sina的域名，yahoo的如下：
1 1 ms 1 ms <1 ms 172.21.127.1
2 3 ms <1 ms <1 ms 10.236.253.17
3 3 ms 3 ms 3 ms 10.236.253.46
4 12 ms 6 ms 5 ms 172.21.202.198
5 103 ms 100 ms 100 ms 172.21.202.18
6 102 ms 109 ms 99 ms 172.21.202.17
7 101 ms 101 ms 102 ms 10.236.252.6
8 104 ms 103 ms 106 ms 10.236.252.22
9 101 ms 107 ms 101 ms 140.242.214.1
10 104 ms 157 ms 165 ms lag1.esr2.sngp.masergy.com [64.138.1.25]
11 135 ms 143 ms 136 ms ge-5-2-1.esr1.hkca.masergy.com [64.138.1.89]
12 138 ms 135 ms 141 ms lag1.esr1.hkca.masergy.com [64.138.1.46]
13 164 ms 136 ms 140 ms fe3-31.br02.hkg04.pccwbtn.net [63.218.252.89]
14 138 ms 142 ms 137 ms tenge8-0.cr02.hkg04.pccwbtn.net [63.218.60.125]
15 295 ms 373 ms 302 ms pos10-2.br02.sjo01.pccwbtn.net [63.218.6.190]
16 303 ms 310 ms 303 ms 63-218-179-34.static.pccwglobal.net [63.218.179.34]
17 374 ms 357 ms 296 ms ae-3.pat2.swp.yahoo.com [216.115.96.57]
18 312 ms 298 ms 340 ms ae-6.pat2.gqb.yahoo.com [216.115.96.62]
19 321 ms 309 ms 310 ms ae-0.msr2.gq1.yahoo.com [66.196.67.23]
20 321 ms 299 ms 329 ms xe-9-0-0.clr2-a-gdc.gq1.yahoo.com [98.137.31.141]
21 298 ms 311 ms 299 ms et-18-25.fab2-1-gdc.gq1.yahoo.com [98.137.31.170]
22 315 ms 304 ms 324 ms po-10.bas2-7-prd.gq1.yahoo.com [206.190.32.31]
23 299 ms 322 ms 308 ms ir1.fp.vip.gq1.yahoo.com [206.190.36.45]
sina的如下：
1 <1 ms 3 ms <1 ms 172.21.127.1
2 <1 ms <1 ms 3 ms 10.236.253.17
3 2 ms 2 ms 5 ms 10.236.253.46
4 8 ms 5 ms 6 ms 172.21.202.198
5 113 ms 103 ms 103 ms 172.21.202.18
6 99 ms 101 ms 99 ms 172.21.202.17
7 100 ms 100 ms 110 ms 10.236.252.6
8 99 ms 100 ms 98 ms 10.236.252.22
9 100 ms 103 ms 101 ms 140.242.214.1
10 102 ms 101 ms 100 ms lag1.esr2.sngp.masergy.com [64.138.1.25]
11 135 ms 134 ms 134 ms ge-5-2-1.esr1.hkca.masergy.com [64.138.1.89]
12 134 ms 142 ms 231 ms lag1.esr1.hkca.masergy.com [64.138.1.46]
13 137 ms 134 ms 135 ms fe3-31.br02.hkg04.pccwbtn.net [63.218.252.89]
14 305 ms 306 ms 324 ms 192.205.36.233
15 313 ms 314 ms 343 ms cr1.sffca.ip.att.net [12.122.200.10]
16 309 ms 311 ms 315 ms cr83.sj2ca.ip.att.net [12.122.158.6]
17 310 ms 313 ms 546 ms gar4.sn1ca.ip.att.net [12.122.110.61]
18 310 ms 309 ms 320 ms 12.122.251.142
19 296 ms 295 ms 295 ms mdf001c7613r0004-tge-12-1.sjc1.attens.net [12.130.128.174]
20 296 ms 296 ms 297 ms 12.130.132.30
我觉得sina的比较好懂，yahoo的有一个疑问，看到最后几个router的名称都带有yahoo的字样，也就是说这些已经是yahoo内部的路由器了吗？一般的web server架构中应该会有负载平衡，web server, db server等几种吧，难不成yahoo连自己内部的路由器都放任别人来trace route吗？