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ADVNET - L3

OSI Model & TCP/IP SUITE​

QuestionAnswer
categorize and provide a structure for networking protocols and standards.​ Networking models
are a set of rules defining how network devices and software should work. Protocols
A conceptual model that categorizes and standardizes the different functions in a network.​ Open Systems Interconnection model
This layer is closest to the end user.​ Interacts with software applications, Application Layer​
- Data in the application layer is in “application format”.​ It needs to be translated into a different format to be sent over - the network​ - job is to translate between application and network formats.​ Presentation Layer
Controls dialogues ( sessions) between communicating hosts.​ Establishes, manages, and terminates connections between the local application ( ex., your browser) and the remote application (ex. Youtube)​ Session Layer​
Network engineers don’t usually work with the top 3 layers.​ The Upper Layers​
- Segments and reassembles data for communications between end hosts.​ - Break large pieces of data into smaller segments that can be more easily sent over the network and are less likely to cause transmission problems if errors occur.​ Transport Layer​
- Provides connectivity between end hosts on different networks (ex., Outside of the LAN)​ - Provides logical addressing ( IP address)​ Network Layer​
- Provides node-to-node connectivity and data transfer (ex., PC to switch, switch to router, router to router).​ - Defines how data is formatted for transmission over a physical medium Data Link Layer​
- Defines physical characteristics of the medium used to transfer data between devices.​ - Ex. Voltage level, maximum transmission distances, physical connectors, cables specifications, etc.​ Physical Layer​
- Conceptual model and set of communications protocols used on the Internet and other networks.​ Similar structure to the OSI Model, but with fewer layers.​ - This model is use in modern networks.​ TCP/IP Suite​
Created by: user-1782765
 

 



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