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Old 04-11-2009, 07:47   #2
Sephiroth
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Re: Intermittent browsing

If it's packet loss you're complaining about, then it might help to understand its significance. (You can look up some of the acronyms!)

1/
GAMING - generally uses UDP packets. Lost packets are the responsibility of the application to manage, Real time games are unlikely to request a re-send of the packet. So you'll get jerky performance or application instability.

2/
DOWNLOADING - uses TCP packets. Lost packets are re-requested from the source and eventually the data arrives at whichever end intact. If packet loss rises above 5%, then you'll notice the effect of repeats because effective throughput drops.

3/
PING & TRACERT - uses the ICMP protocol which bears no relation to real life data transfer. It is a protocol used for diagmostics as you have done. The PING test tells you whether you have end-to-end connectivity and the overall quality of the link as expressed in the packet loss rate. TRACERT tells you where the bottleneck or problem might be. You'd need to ping/tracert to different web sites, say overseas, to maximise the chance of a common path in the UK so that you could see if there is an identifiable bottleneck.

So, a single ping/tracert test is inconclusive and a range of statistics would be necessary.

Since your modem stats are fine, there might be a bottleneck in the system. By the way, a busy/oversubscribed router in the VM chain would discard packets; TCP packets would be re-transmitted and that effect would appear in the 5% packet loss figure.

Hope all that helps answer your question.
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