Interpretation of Win XP Perfmon data on network

Anyone know of a source of information to explain the statistics available
via Win XP's Perfmon?

I have been troubleshooting a wireless link running 150 yrds through one
building.

Statistics I note:

Datagrams received discarded 187 and it has been as high as 1000

Packets received unknown 24

Packets outbound error 4


What does all this mean?
--
Bob Alston



---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.717 / Virus Database: 473 - Release Date: 7/8/2004