Error detection at data link level is achieved by using a Frame Check Sequence (FCS) method like Parity, Checksum Calculation or Cyclic Redundancy Check (CRC).
Data Link Layer
Layer 2 - The Data Link Layer Layer 2 of the OSI model provides error-detection capability
support error detection =)
The Transport Layer and Data Layer can provide error detection and correction at the different levels of data transmission. Network layer can also correct errors if it detects them.
* addressing * error detection * frame delimiting
Data Link
Data link
to represent the frames sequence numberI believe this is wrong in the 5th edition....Network+ Guide to Networks on page57 it states that protocols in the data link layer add a header to the front of each packet and a trailer to the end of each packet to make frames. (The trailer indicates where a frame ends.)paragraph 4
what are the merits and demerits of data communication
The mechanical layer that sits on top of the physical layer in the OSI model is the data link layer. This layer is responsible for node-to-node data transfer and error detection and correction, ensuring reliable communication between devices on the same network. It encapsulates the raw bitstream from the physical layer into frames, adding necessary addressing and control information.
layer 4 is responsible of error free data transmission
The main characteristic of the data link layer is its role in providing reliable communication between directly connected network nodes. It is responsible for framing, addressing, error detection and correction, and managing access to the physical transmission medium. This layer ensures that data packets are transmitted accurately over a physical link, facilitating error-free and efficient data transfer. Additionally, it handles flow control to prevent overwhelming a receiving device.