Network multiple Raspberry PI's to run SETI

I am new to the community so please have patience. I know what I want to do is possible, I am just not sure how. I have a Comcast/Xfinity for my internet. I have a WI-FI/switch (4 ports). I ran a hardline from one port on the switch to my computer in the office. I have begun to experiment with a Raspberry PI 3. It is up and running. I am running BOINC and chose to run data from SETI. The Raspberry is currently talking to the WI-FI. I would like to add more Raspberry PI's as time and money allow. Is it possible to hook to use the hardline I have already  run to a switch (probably the 16 port one) and plug my computer and the other Raspberries into the remaining ports? It is impractical to have multiple keyboards and monitors, so I was hoping to be able to use my PC as a terminal tp "talk" to the Raspberried using there ID's and port.