CHAPTER 3
Data Link Layer
This chapter discusses protocols associated with the data link layer. The protocols covered are Address Resolution Protocol (ARP), Reverse Address Resolution Protocol (RARP), link layer functions, Link Layer Discovery Protocol (LLDP), and Cisco Discovery Protocol (CDP). As mentioned earlier, the data link layer must ensure that messages are transmitted to devices on a LAN using physical hardware addresses, and they also must convert packets sent from the network layer, and convert them into frames to be sent out to the physical layer to transmit. The data link layer converts packets into frames, which adds a header that ...
Get Cisco Networks: Engineers’ Handbook of Routing, Switching, and Security with IOS, NX-OS, and ASA now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
