I assume that these settings are in the Network control panel. The P475 is running Mac OS 8.1 at the moment.
I did learn yesterday that I need to use a crossover cable to connect a hub and a switch together and that cat. 3 cable upwards should be OK for the 10baseT hub.
Yeah if they're available these settings are in the Network control panel somewhere. I haven't played with stuff like that in a while so I don't remember for sure.
Some networking tidbits:
The CAT rating of a cable refers to the maximum speed the cable can support. CAT1 and CAT2 are old and typically only used for phones, CAT3 is for phones and up to 10bT Ethernet, CAT4 wasn't much of a thing but could support a maximum of 100bT, CAT5 is ubiquitous for 100bT, CAT5e/CAT6/CAT7 all support 1000bT, though depending on the length of the cable run you'll want to use CAT6 or 7 over 5e. The primary differences between the CATs are the grade of the wires used therein and the degree to which the individual pairs are twisted and separated from the others: the tighter the twist and the wider the separation between pairs, the lower the interference, and the greater the possible maximum speed. As such, you can always use a newer cable on an older device with no problems. I've done installs for phones using CAT6 cable.
There are two standards for wiring RJ45 cables for networking: TIA-568A and B. For premise wiring, the A standard is primarily used in Europe while the B standard is used in the USA; other regions will vary. The only difference is the switching of the orange and green (send/receive) cable pairs between the two (so the first two pins on A are white-green/green while B is white-orange/orange), A normal straight-through networking cable will be the same standard on both sides (A to A or B to B ). A crossover cable has a different standard on the other side, so it's A to B. This double standard cable switches the send and receive pairs so that they are in the correct position for connecting like-to-like devices (DTE to DTE, DCE to DCE).
There are DCE (Data Communication Equipment) and DTE (Data Terminal Equipment) devices. Switches and hubs are DCEs while computers and usually routers (at least, large network routers) are considered DTEs. When you connect like-for-like devices, you need to use a crossover cable because otherwise the devices will be unable to communicate since they would be trying to send or receive data on the same pins. Nowadays the use of a crossover cable isn't strictly necessary, but with older equipment you have to keep in mind that auto-crossover LAN jacks were only recently (2002ish) introduced and weren't really widespread until fairly recently. Sometimes older network devices have a configuration switch and/or dedicated uplink port that will allow you to use a straight-through cable in place of a crossover.