Common transport layer protocols

- [Instructor] Before we jump into layer four, let's catch our breath and make sure that we're visualizing how everything is coming together. Do you recall the names for data? We used the acrostic "bacon frying produces salivation" as a memory aid to remember bits at layer one, frames at layer two, packets at layer three, and segments at layer four. So here at layer four we're going to have segments containing data from upper layers. That data could be the contents of an email or a web page that we're viewing as just a couple of examples. That layer four segment is then going to be encapsulated in a layer three packet which is then going to be encapsulated in a layer two frame. And finally, the frame is transmitted as a series of ones and zeros that we refer to as bits. And there are two primary protocols at the transport layer. They are TCP, which stands for transmission control protocol, and UDP, which stands for user…