a VOIP adapter
To do that, an additional device is required, a network hub or a network switch, which all computers in the network segment should have to be connected to.
Media is always required to connect one device to another on a network. It doesn't matter if it is a client server network or a peer to peer network.
node
A network ready device is a device that has the potential to connect to a network, natively it isn't connected to a network, nor is it a network, but with the appropriate configuration and possibly with the addition of components could be connected.
NIC (Network Interface Card)
You can connect your device to internet network wirelessly.
valid IB
a modem
Switch
a modem
A mobile phone.
One device that is shared on the network is a router. This is the one that will connect the various devices to the shared network.