3. How does switch work?

 

3. How does switch work?



12.12.2018
Topic Progress:

How does switching work – Video: Register for Course


How does switching work – Transcript:

IP World Throwback

On our latest videos „Introduction to IP World” we have found out that bits are language of machines , how packets traverse the network and that whole logic is organized thanks to Internet Protocol. We know that networks consist of: network devices and end devices which produces SYMBOLS that we call BITS and form them into PACKETS. We have also learned what is router and how does it work…

Routing Throwback

To allow communication between billions of devices network devices are needed. As we know from the How Router works video, routers like crossroads and road signs properly direct packets from source to destination. They look into the packet searching for destination IP address. Source and desitnation IP are included in packet header. So far, so good.

Now, we need to have some devices that allows us to connect high amount of users and wired devices together. This is something that routers are not inteded for. Because Routers in most situations has limited number of ports, operate with more advanced features and they are more expensive. Lets imagine that we need to connect small home network with router to Internet Provider and 4 laptops !

Not possible….because of not enough ports!

How Does Switch Work

Now, we need to have some devices that allows us to connect high amount of users and wired devices together. This is something that routers are not inteded for. Because Routers in most situations has limited number of ports, operate with more advanced features and they are more expensive. Lets imagine that we need to connect small home network with router to Internet Provider and 4 laptops !

Not possible…. because of not enough ports!

Purpose of Switch

That’s why we need switches! But not only port density and the cost is the domain of switches, but also the way they work:


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