Can I extend the number of ethernet connections

I want to use my airport extreme for both wireless and wired.  Since there are only three ethernet connections can I expand the connections by adding a unit that has just more ethernet connections?  If so which connection on the airport extreme would you use as the uplink to the switch?

can I expand the connections by adding a unit that has just more ethernet connections?
Yes, you could add an Ethernet switch. They come in 5-port, 8-port, 16-port, etc. versions. Buy a switch with a few more ports than you need at the present time, since they have a way of filling up faster than you might imagine.
Connect the Ethernet switch to one of the three LAN <-> ports on the AirPort Extreme.
Since the Ethernet ports on the AirPort Extreme will handle Gigabit speeds, make sure that you get a Gigabit Ethernet switch.
The computer/electronic superstore near you will have just what you need. Recommended brands are Netgear and Cisco.

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