RAX30 as access point

Hello,

Actually I use a Netgear WAC104 access point to extend the wifi network and the cabled network.
I'm thinkig to upgrade the access poit to a more modern wifi access, but I have a question about using a router (e.g. RAX30) configured as access point.
If a router as RAX30 model is configured in access point mode, I need to connect the existing network to the WAN port, but can I also use the other 4 ethernet port to extend the network as the actual WAC104 model?

Thanks.