Ask an HTTP protocol packet capture analysis

Ask an HTTP protocol packet capture analysis
I used Wireshark's grab bag, there is a question about the cookie to understand:

When Get/user.php?act=login http/1.1\r\nPost-return http/1.1 ok\r\nThe cookie is set as follows:
ecs_id=0a22939846734023b5b1dfd98de4d0f28230d386; path=/
Ecs[visit_times]=1; Expires=sun, 07-oct-2012 17:39:28 GMT; path=/
Then get/captcha.php?is_login=1&2132503621 http/1.1\r\n's cookie is:

cookie:ecs_id=0a22939846734023b5b1dfd98de4d0f28230d386; Ecs[visit_times]=1; cnzz_a2408473=0; sin2408473=; rtime=0; ltime=1318124382171; cnzz_eid=55038762-1318120773-; __utma=17458850.2041195220.1318124382.1318124382.1318124382.1; __utmb=17458850.1.10.1318124382; __utmc=17458850; __utmz=17458850.1318124382.1.1.utmcsr= (direct) |utmccn= (direct) |utmcmd= (none)

Do not understand where this cookie comes from, please the Great God guidance! Thank you!
PS: Score is not much, pour out only 52 points. Thank you!

------Solution--------------------
Rub professionals ah a library ...
discuss

Reference:

The thought of the NIE
Reference:

A total of three categories, one is Google, one is Cnzz, one is ecshop, except this system cookie, the other two categories are statistical analysis role.
Acridine kill Butterfly thought dense

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