In section "2.2 Building a network", the text says "There are three main type of datalink layers".
The text then explains Point-to-point and LAN datalink layers.
No information can be found about the third type (NBMA) since the text about it is actually commented out.
In section "2.2 Building a network", the text says "There are three main type of datalink layers". The text then explains Point-to-point and LAN datalink layers. No information can be found about the third type (NBMA) since the text about it is actually commented out.