apache日志问题

[21/Sep/2008:17:39:15 +0800] OPTIONS / HTTP/1.1" 301 - "-" "Microsoft-WebDAV-MiniRedir/5.1.2600"
[21/Sep/2008:17:39:16 +0800] "OPTIONS / HTTP/1.1" 200 4468 "-" "Microsoft-WebDAV-MiniRedir/5.1.2600"
[21/Sep/2008:17:39:18 +0800] "OPTIONS / HTTP/1.1" 301 - "-" "Microsoft-WebDAV-MiniRedir/5.1.2600"
[21/Sep/2008:17:39:18 +0800] "OPTIONS / HTTP/1.1" 200 4468 "-" "Microsoft-WebDAV-MiniRedir/5.1.2600"
这是什么意思阿?能不能告诉我下,该不是给人家入侵了吧