The encapsulating starts from layer 4 to layer 2. Layer 4 is called a segment. Layer 3 is called a Packet and LAyer 2 is called a Frame. The other layers are just processes that are performed on the data. Data Encoding /decoding and CRC error checking is performed from LAyer 7 to layer 4, then the encapsulations occur. Layer 2 to layer 1 is more a modulation scheme that takes the digitized data (Frame) and modulates it and shapes it to be placed out on the wire (media). That layer handles the Electrical/ Mechanical and functional standards for the media... Hope this helps...
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...