advice wanted on structuring LAN + internet

[David P. Schwartz]

I'm curious what trade-offs might exist between a couple of different ways of hooking up a
web server and a LAN:

675 modem -> [web NIC -> web server -> LAN NIC] -> LAN hub ==>> multiple workstations

-- vs --

675 modem -> LAN hub1 + -> web server
                      + -> DL-701 -> LAN hub2 ==>> multiple workstations

The DL-701 is from D-Link; it's a little gateway/router/firewall that has DHCP support
built-in.  It sits between the cable/xDSL modem and the LAN hub.

Aside from saving a NIC in the server box (whoopee), I'm wondering if there are any
configuration and/or performance issues that arise by having the web server handle the
internal LAN routing vs. letting the DL-701 handle this.

(In the second configuration, the first LAN hub can be 10-BaseT, while the second can be
100-BaseT.)

-David