Networking Devices

Networking Devices

	Modem Modem is a device which used for modulation and demodulation of digital signal to analog signals and vice versa. Modems are small box like devices used in dial up network connections. Standard model modems handle data at 56000 bits per second.
	Router A router is a type of device which acts as the central point among computers and other devices that are part of a network. A router is equipped with holes called ports by which computers and other devices are connected to a router using network cables. Now-a-days router comes in wireless modes using which computers can be connected.
	Hub A hub, in the context of networking, is a hardware device that relays communication data. A hub sends data packets to all devices on a network, regardless of any MAC addresses contained in the data packet.
	Switch A switch is a device which is used to connect multiple number of computer in a network. It stores the MAC address of the every computer and to which port it has been connected. When it receives the data packet,it checks the mac address and forwards it to the destination.
	Firewall A firewall is a network security system, based hardware or software that controls incoming and outgoing network traffic based on a set of rules. Acts as a barrier between a trusted network and other untrusted networks. This means that the only traffic allowed onto the network defined in the firewall policy is; all other traffic is denied.