帮看下这是正常的请求header吗

Question

GET /2011/05/24/13062223128224882.jpg HTTP/1.1
Accept: */*
Connection: keep-alive
Host: 1.1.1.1      (我的机器IP，而不是mydomain，正常访问应该是域名啊，咋回事。。。)
Pragma: no-cache
Referer: http://mydomain.com/read_9542401_1_0.html
ThreadID: 5240   (不知道这是什么东东？？？)
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; GTB6; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506
.648; .NET CLR 3.5.21022; .NET CLR 1.1.4322; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)