7 Layer of OSI Model
Physical Layer Responsible for communication with the data link layer and fragmentation Data into Frames.
Data link Layer
Data Link Layer is the Second layer of the OSI Model which is responsible for the Communication with the Network layer which is above it and the Communication with the Physical Layer. Its also responsible to encode the bit into packet and decode the packet into bit. Its provide error free transfer the frame one node to another node.
Its Responsible for the transmitting and receiving frames within the Local area Network and Establish and termination link between two nodes.
Functions of the Data Link Layer
- Logical Link Control.
- Media Access Control.
- Data Framing.
- Hardware Addressing.
- Error detection and Handling.
Network layer is the Third Layer of the OSI Model which is responsible for the Communication with the Transport layer and Data link Layer and Responsible for the Connectivity between host and network. Network Layer work based on the IP Address which is called Logical Address . Its use to route the packet among the inter-networks. Its responsible for the provide Connectivity between two or more then two different network.
- Logical Addressing ( IP Addressing).
- Datagram Encapsulation.
- Fragmentation and Reassembling .
- Error handling and diagnostics.
- Transmission control protocol (TCP).
- User Datagram protocol (UDP).
- File Sharing and resources.
- Remote Files and printer access.
- Web Browsers .