Data Link Layer

The data link layer is concerned with putting data on and getting data from media. Each host on the same medium has a unique physical address. Once a data link is established, the hosts exchange frames of data.

Examples for data links are:

• Ethernet

• WiFi

• LTE

• Satellite Communication

In this class we will only be configuring Ethernet networks. The following sections will give you a basic understanding of how Ethernet works:

• Ethernet
• Address Resolution Protocol (ARP)
• Ethernet Switches