A Network switch, also called a switching hub or a bridging hub, is a networking hardware that connects devices on a computer network by using packet switching to recieve and forward data to the destination device. On the OSI model they operate on the first 2 layers, the Physical and Data link model:
First of all, add the PCs:
Then the switches:
Then link them together:
wait a bit for the switches to boot, and thanks to this configurations, the PCs will be able to communicate between each other:
Or so we think!
The PCs linked to the switches do not have a valid local ip adress, that is because we need to add in a router.
The Internet Protocol v4 uses a 32 bit address space which provides 2^32 unique adresses with a large blocks reserved for special networking methods.
From this point onward, we will largely make use of the private network subnets (marked red above). These are the subnets which allow us to make use of routers to give private ip adresses to each individual PCs. We need them because the switches are only on the first 2 layers of the OSI model. In order to interact with IP adresses, we need a device that can access the third layer, of the OSI model, the router.
Switches are very effective when it comes to distributing packets in between computers however we need to be able to give each individual PC an ip adress.
Click here to download the pkt file
Next chapter: Routers
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