Networking Hardware:
Eth0: Intel Corporation 82562EZ 10/100 Ethernet Controller (rev 1) (on Main Board = Intel 865 PERL)
Router: SMC7004ABR
Cable Modem: Webstar
Charter.Net provides a dynamic IP configuration to the Router which in tern provides a NAT configuration to Eth0.
Networking works under Knoppix 4.0.2.
Networking works under Knoppix 3.3 through 3.9.
The sound module for the Intel AC97 chip fails to load.

For Knoppix 5.0.1:
The sound module for the Intel AC97 chip loads successfully.
There is no /proc/pci file in 5.0.1 and it exists in 4.0.2.

The startup config for eth0 permits DNS resolution of external website. Pings, both by URL and IP address, fail.
netcardconfig with dhcp for eth0 fails. In 4.0.2, it succeeds.
netcardconfig with manual configuration allows pinging of router at 192.168.2.1. External ping fails without dns resolution, even when external DNS server IP address is added to the router DNS IP address.
Unable to open Router webadmin page at 192.168.2.1, even though able to ping router.
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Different Computer behind same SMC7004ABR router and cable modem:
Network Card: RTL8139C+
Networking works WITH DHCP under Knoppix 4.0.2.
The sound module for the VIA AC97 chip loads successfully.

For Knoppix 5.0.1:
The sound module for the VIA AC97 chip loads successfully.
There is no /proc/pci file in 5.0.1 and it exists in 4.0.2.
The startup config for eth0 fails.
netcardconfig with dhcp for eth0 fails.
netcardconfig WITH MANUAL CONFIGURATION SUCCEEDS.
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CONCLUSIONS For Knoppix 5.0.1:
1. There is a problem with DHCP.
2. There is a problem with hardware detection: e.g. no /proc/pci
3. Intel network chips are not being properly detected or configured.