There are no charge to recylce a 24 port ethernet hub.
View page
An Ethernet Hub allows the user to hook up to four ports at one
time. The Hub will allow you to connect multiple devices and allow
them to act as one.
View page
If you don't have enough ethernet sockets in a router, you can
plug a switch or a hub into the socket. The hub or switch will
supply support for additional ethernet cables.
View page
The central box on a Ethernet is a hub or router.
View page
An active hub can act as a repeater hub. It may also work as an
Ethernet hub, network hub, and a multiport repeater.