Читать книгу CCNP Enterprise Certification Study Guide: Implementing and Operating Cisco Enterprise Network Core Technologies - Ben Piper, David Higby Clinton - Страница 49

The entire process of moving data from one application to another over the network rests on two processes: encapsulation and decapsulation. Without encapsulation and decapsulation, there is no network. In short, each time a higher-layer protocol passes data down to a lower-layer protocol, it's encapsulated. Whenever a lower-layer protocol passes data up to a higher-layer protocol, it's decapsulated.