network to another in an intelligent way. It forwards data packets from source
to destination by the most efficient route. The router has a micro-computer inside
it. This holds a table in memory that contains a list of all the networks it is
connected to, along with the latest information on at that moment how busy each path in the
network is. It is called a routing table.
2. Repeater:-A repeater is a device that operates only in the
physical layer Generally a repeater operates only in the physical layer. Signals that carry information within a network can travel a
fixed distance before the fades of the signal. A repeater receives a signal and regenerates the original bit pattern before it becomes too weak or corrupted,.
The repeater then sends the refreshed signal. with the help of a repeater, we can extend the physical
length of a LAN. It does not actually connect two different LANs, it connects
two segments of the same LAN.
As a data link layer device, the bridge the physical address(MAC-Media
Access Control) contained in the frame.
the network layer, we can say, is a kind of router.
The two-layer switch performs at the physical layer and data link layer.
A two-layer switch is a bridge. With many ports, a bridge can allocate a unique port to each station.
of hardware and software. It operates at the top three layers of the OSI (Open