windump的使用

[csulrong]

我在windows 2000下安装了winpcap之后，使用windump命令得到的输出如下：

C:\Documents and Settings\user>windump
windump: listening on \Device\NPF_GenericDialupAdapter
16:55:05.906250 94:2f:20:52:41:53 (oui Unknown) 802.1b-gsap > 03:00:00:00:00:02
(oui Unknown) 802.1b-isap ui/C
16:55:15.906250 94:2f:20:52:41:53 (oui Unknown) 802.1b-gsap > 03:00:00:00:00:02
(oui Unknown) 802.1b-isap ui/C
16:55:25.906250 94:2f:20:52:41:53 (oui Unknown) 802.1b-gsap > 03:00:00:00:00:02
(oui Unknown) 802.1b-isap ui/C
16:55:35.906250 94:2f:20:52:41:53 (oui Unknown) 802.1b-gsap > 03:00:00:00:00:02
(oui Unknown) 802.1b-isap ui/C

4 packets captured
4 packets received by filter
0 packets dropped by kernel

为什么和网络上很多讲解windump的文章里的数据完全不一样啊？
为什么会发生这个问题啊？