____________________________________________
This model is another way to look at the overall data transport process, and it also uses layers to illustrate the process. However, the TCP/IP model uses only for layers to do so. For the CENT, CCNA, and any entry-level certification exam from another vendor, it's a very good idea to know.
- the layers of both the TCP/IP and OSI model
- the responsibilities of each layer
- how the layers map from one model to another
The Application layer of the TCP/IP model maps to the top three layers of the OSI model (Application, Presentation and Session). Everything that the top three layers of the OSI model do is performed by the TCP/IP model’s Application layer.
The Transport layer of the TCP/IP model maps directly to the Transport layer of the OSI model. TCP and UDP both operate at this layer, and data takes the form of segments.
The Internet layer of the TCP/IP model maps to the Network layer of the OSI model. Both layers are responsible for routing through the use of IP addresses, static routes, and dynamic routing protocols.
(You will occasionally see some non-Cisco documentation call this layer the Internetwork layer, but “Internet” is the name used in Cisco documentation.)
Finally, the Network Access layer of the TCP/IP model maps to the Data Link and Physical layers of the OSI model.
____________________________________________
This model is another way to look at the overall data transport process, and it also uses layers to illustrate the process. However, the TCP/IP model uses only for layers to do so. For the CENT, CCNA, and any entry-level certification exam from another vendor, it's a very good idea to know.
- the layers of both the TCP/IP and OSI model
- the responsibilities of each layer
- how the layers map from one model to another
The Application layer of the TCP/IP model maps to the top three layers of the OSI model (Application, Presentation and Session). Everything that the top three layers of the OSI model do is performed by the TCP/IP model’s Application layer.
The Transport layer of the TCP/IP model maps directly to the Transport layer of the OSI model. TCP and UDP both operate at this layer, and data takes the form of segments.
The Internet layer of the TCP/IP model maps to the Network layer of the OSI model. Both layers are responsible for routing through the use of IP addresses, static routes, and dynamic routing protocols.
(You will occasionally see some non-Cisco documentation call this layer the Internetwork layer, but “Internet” is the name used in Cisco documentation.)
Finally, the Network Access layer of the TCP/IP model maps to the Data Link and Physical layers of the OSI model.
____________________________________________
No comments:
Post a Comment