OSI model mind map

1. 3.Network

1.1. Network1

1.1.1. Provides network addressing and routing (host-to-host)

1.2. Network2

1.2.1. Provides network addressing and routing (host-to-host) Directs the data to the next node

1.3. For example: Internet Protocol (IP)

2. 4.Transport

2.1. Provides end-to-end connections and reliability Moves data from the sender to the receiver (process-to-process)

2.2. The delivery of a complete file from the process on one computer to the process on another computer is the job of the transport layer.

2.3. Transmission protocol control (TPC)

2.4. User datagram protocol (UDP)

3. 5.Application

3.1. 6.Session

3.1.1. Maintains connection for ongoing data exchange between two nodes.

3.1.2. Usually connection is between a remote client and an access server.

3.2. 7.Presentation

3.2.1. Handles data encryption such as scrambling of passwords and decryption.

3.2.2. Also interprets encoded information, translating it for reading.

3.3. Provides application services to users and programs (application-to-application) Builds distributed “network services” on transport services

3.4. For examle : Web, domain name service (DNS), file transfer services, email services, and video streamin

3.5. Uses HTTP to interpret web servers response

3.6. Protocols: HTTP, DNS, FTP, SMTP, and RTP.

4. 1.Physical

4.1. The pysical layer accepts frames from the Data Link Layer and generates signals as changes in voltage, this is done by the NIC.

4.2. When recieving data the physical layer detects the changes in voltage which is then passed to and translated by the Data Link Layer.

4.3. Sets transmission rate and also monitors date error rates but can not perform error connections.

4.4. For example : Modem

5. 2.Data

5.1. Reliably transmit data frames between two nodes connected by a physical layer

5.2. For example :WiFi,Ethernet.