Hi,
I home office and have a home office Internet connection which allows me
to run servers.
Are these servers internal to your LAN only?
If you plan to expose them to the Internet, then consider defining a DMZ and keeping the servers in the DMZ.
Read up your router doc for details
I am using a consumer grade router that has WIFI and 4 RJ11 ports.
Currently I need 6 RJ11 connects. Not everything is turned on all the
time.
Minor correction - RJ45 is for LAN wiring (4 pairs); RJ11 (2 pairs) is for regular telephone wiring.
My research suggests I add a network switch to the mix.
You are correct, you need a switch to expand the RJ45 ports in your router.
I assume I would keep the connection to the modem to the router and
connect one of the RJ11 ports to a switch and connect all my devices to
the switch, leaving the other 3 RJ11 ports on my router not connected.
Yes!
If this is actuate, any suggestions on a "consumer" grade 10 ports
switch? Or would a more commercial switch be better?
Given your scenario (all other devices are consumer grade) I would say a "consumer" grade Gigabit switch would be sufficient. I suggest you get yourself a fanless 16-port switch.
Commercial (Enterprise) grade switches are more expensive. They are typically "managed" switches with "enterprise" features e.g. VLAN, DHCP, L3 routing, etc., -- an overkill for your use case.
I buy used stuff on eBay at less than half the price of a new one. Sometimes, you can find new equipment (liquidation of overstock).