# lec1 \
First we'll define some terminology. 

> Hosts \
End systems - typically don't bother with routing data through a network 

> Comm Links \ 
Typically the actual systems that connect things together. \

## Network edges 

Can be subdivided clients & servers and sometimes both at the same time. \

## Access network: cable network 

Typically when have to share one line we can change the frequency of the signal as one method to provide a distinguishment between different data which may sometimes come from different sources. 

### Home Network

Starting with the modem. All it does it take some signla and convert it to the proper IEEE data format(citation needed).
Typically we then pipe that data to a router which then just goes around the house in whatever configuration you may need.
Typically, especially for small businesses, star topology is common where there is some switch in the middle for traffic to be forwarded from the router/modem setup to the individual nodes on the outside of the star.