Q. Show Data link and Physical vs Subnet?

- Data link layer

• The function of the Data Link Layer is -offers for the control of the physical layer and detects and possibly corrects errors which may occur? (IOS/IEC 7498:1984). In another prose the Data Link Layer transforms a stream of raw bits (0s and 1s) from the physical into a data frame and provides an error-free transfer from one node to another allowing the layers above it to assume virtually error-free transmission

- Physical layer

• The function of the Physical Layer is to offer - electrical, mechanical, functional and procedural means to activate a physical connection for bit transmission? (ISO/IEC 7498:1984). Fundamentally this signifies that the typical role of the physical layer is to transform bits in a computer system into electromagnetic (or equivalent) signals for a particular transmission medium (fiber, wire etc.)