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R5.3 OSI Layer Model and Protocols - Coggle Diagram
R5.3 OSI Layer Model and Protocols
Physical Layer- Responsible for the transmission of data over network communication media.
Includes the network medium- This layer also includes the process of
Includes the process of transmitting and receiving signals from the network medium.
Encoding and signaling.
Data transmission.
Data Link Layer- Responsible for transferring data between devices. Responds to requests from the network layer above it and issues requests to the physical layer below it.
Network Layer- Decides which physical path the data will take.
Moves data around a network of networks commonly known as the internet.
Transfers info between networks by examining the logical network address and routing the packets using routers.
Transport Layer- Transmits data using transmission protocols including TCP and UDP.
Transmission Control Protocol- Responsible for sequences and acknowledgment of packets sent.
User Datagram Protocol- Provides a one-to-one or one-to-many communication service which is connectionless and unreliable.
Session Layer- Maintains connections and is responsible for controlling ports and sessions.
Allows applications running on different computers to communicate with each other.
Presentation- Ensures that data is in a usable format and is where data encryption occurs
Translates data into suitable formats so that it can be read by the application
Application Layer- Where applications can access the network services.
Hypertext Transfer Protocol, web pages.
Protocols such as HTTP and FTP are used for the exchange of user info.
File Transfer Protocol.
Internet Layer- Responsible for the addressing, packaging and routing functions. The protocols used are IP, ARP. Address Resolution Protocol.
IP Protocol- Responsible for IP addressing, routing.
ARP- Ensures the address of the internet layer can be linked to the network interface layer address.