請教各位高手一個案例：
公司一台NB，不論是使用無線網路、3.5G網卡都不曾有問題。
但是使用有線網路的時候，此NB在家裡用ADSL撥接沒問題，
在客戶端使用客戶端的網路也沒問題。單單在公司使用有線網路
會出現時斷時好的情形：
具測試，公司其他電腦並不會發生類似此NB網路時好時壞的問題。
(包括兩台NB接同一台switch，此switch接到core端，另一台NB都沒問題)
此NB換過網路port，依然是有一樣的情形。
實在是抓不出來問題在哪阿 .... 請各位高手幫幫忙吧！
作業環境：
ASUS U6sg
winXP Pro
C:\Documents and Settings\Ray>ping 192.168.52.253 -t
Pinging 192.168.52.253 with 32 bytes of data:
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Reply from 192.168.52.253: bytes=32 time<1ms TTL=255
Ping statistics for 192.168.52.253:
Packets: Sent = 31, Received = 26, Lost = 5 (16% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
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