In the last lecture, we talk about a hub which basically connects to different networks segments together,
but I also told you that Hub is a non intelligence device, which means it transfers segments, packets
to all other devices in this lecture.
We're going to talk about a bridge, a bridge specifically.
A transparent bridge is a network device that connects to similar network segments.
Together, its primary function is to keep traffic separated on either side of the bridge, breaking
up the collision domains, as you can see on the screen.
No, on the screen you can see that like the example of Unguessed, so you can clearly see a laser pointer.
Yes.
So now this segment is now suppose this laptop wants to communicate with this PC.
So if it was a hub here, this laptop would send a packet to this hub and unnecessarily Hub would transmit
the packet to this PC to speak to this person to everyone.
So what a bridge does is basically it separates this traffic from this traffic.
So you don't need to actually send each and every package to every other device.
Then transmission is allowed to pass through the bridge only if it is intended for the opposite side.
For example, if this PC wants to send the packet to this PC, then only the bridge will allow the packet
to pass.
And that is why sometimes some network professionals also call Bridge as an intelligent hub.
Basically, it is transmitting the packet to and through the network.
It is the same function as the hub.
But in this case, a bridge is using its mechanism to actually see if that packet is really intended
for the opposite side of the network.
It just doesn't keep on transmitting random packets to each and every receiver now, but it uses mackerels
to make forwarding decisions and hence bridge is considered as a layer to device.
Now bridge and switch are almost similar and the term projects which are often used interchangeably
because the two devices are mostly use of bridging technologies, the past is there for a reason.
You'd be hard pressed to buy a bridge today.
So keep buying bridge, but make sure that you clearly understand the difference between bridge hub
and a switch.
It is really very important that you understand all these differences.