Amazon.com: Cmple - 2 Port Cat5e Surface Mount Box, RJ45 Cat5 Dual Port Surface Mount Box for Ethernet Cables, Screws and Double-Side Tape Included, Easy Mount – White : Electronics
Black Box LB532A-M-R2 Multi-Drop Ethernet Extender | Free Shipping
Monoprice Cat6 1000ft Blue CM UL Bulk Cable, Stranded (w/spine), UTP, 23AWG, 550MHz, Pure Bare Copper, Pull Box, Bulk Ethernet Cable - Monoprice.com
New house with Ethernet ports in all rooms but no idea how to use it. There is a control box with an Ethernet switch. Image attached : r/HomeNetworking