The difference between a Bridge and a Router

A bridge is a network device that operates at the data link layer. Through a bridge, data or information is not stored and is sent as packets. A router, on the other hand, is also a network device that operates at the network layer. Through a router, data or information is stored and sent as packets.

A bridge is a network device that operates at the data link layer. Through a bridge, data or information is not stored and is sent as packets. A router, on the other hand, is also a network device that operates at the network layer. Through a router, data or information is stored and sent as packets.

What is a bridge?

In computer networks, a bridge, also known as a Layer 2 switch, is a type of network device used to divide a network into parts. In the OSI model, a bridge operates at Layer 2, which is the data link layer. Its main function is to inspect incoming traffic and determine whether to filter or forward it.

For example, an Ethernet bridge examines each incoming Ethernet frame, including the source and destination MAC addresses; and sometimes the frame size as it processes individual forwarding decisions.

Bridges are similar to repeaters and hubs in that they transmit data to all nodes. However, bridges maintain the Media Access Control (MAC) address table as soon as they discover new segments, so subsequent transmissions are only sent to the intended recipient.

Types of bridges

Transparent Bridge : Other devices on the network cannot see the transparent bridge.
Translational Bridge : Capable of switching between different network systems.
Source-route Bridge : The name Source-route Bridge comes from the fact that the entire route of a frame is embedded within that frame.

Things you need to know about Bridge

Bridge operates within the data link layer of the OSI model.
It is not possible to configure any routing protocols within a bridge.
Bridges transmit data in the form of frames.
A bridge is used to connect two different LAN segments.
The bridge operates on a broadcast domain.
There are only two gates in the bridge.
Bridge devices do not use routing tables or any other devices to transmit data to their destination.
With the help of MAC addresses from connected devices on the network, bridges listen to network traffic and then decide the best path to send the data.
The bridge determines the destination address with the help of the device's MAC address (i.e., Ethernet address).
The bridge doesn't create multiple paths for sending data.
Bridges are good for segmenting networks and extending existing networks.

What is a router?

A router is a network device that forwards data packets between computer networks. Routers perform traffic routing functions on the Internet. They then use information in routing tables or routing policies to direct packets to the next network on their path.

Types of routers

Wired router
Wireless router
Core router and edge router
Virtual Router

Things you need to know about routers

Routers operate within the network layer of the OSI model.
Protocols such as RIP, IGRP, OSPF, etc., can be configured in the router.
Routers transmit data in the form of packets.
Routers are used to connect LAN and WAN networks.
The router operates across multiple broadcast domains.
There are more than two ports in the router.
In a router, the routing table is used to route data to its destination.
Routers communicate with other routers to determine (select) the best path for data transmission.
Routers use network address configuration software (IP addresses) to determine addresses.
Routers create multiple paths for sending data.
Routers are great for joining remote networks.
Examples of routing protocols include: TCP/IP, IPX/SPX, Apple Talk.