Routers create a private virtual session for each connection, they do not broadcast your connection to all computers, they optimize network traffic.
Network hub can be shared with your home or office and also serve as a router too
Bridge, Switches, Router.
You do not have to connect your router to your PC via ethernet cable, you can instead connect via wi-fi and your router must be connected to your hub.
A router allows communication between two different networks. A hub just links devices in a network.
Multicasting can be done on a hub but a hub does not need it always. Configuring a router or switch to use multicasting requires that the router or switch be IGMP capable.
A wired or wireless router.
If the is just a Hub, It will not work. You need a router/hub. A router/hub combination allows you to connect to your ISP and link all computers within your home. The cost is cheap and the installation is simple. I recommend you to purchase a router/hub at your local computer, electronics store. Follow the simple directions and you will be operational in no time.
router
More like an antennae.
hub
No, the USB and the router including the hub do not have to be the same brand. They can be different brands.
In most cases you can.