Can this be used a a router
Can this be used with a cable modem as a router in a wired home network?
No. A switch is something you basically plug into a router to gain additional Ethernet ports. A router is needed to make one address from your modem into multiple addresses so you can share your Internet connection with multiple devices. Most routers provide a wifi signal and/or multiple Ethernet ports so a switch is only needed if your router doesn't have enough ports (places to plug a cable in).