COMPUTER NETWORKING

Detailed explanation-1: -Layer 1 of The OSI Model: Physical Layer defines electrical and physical specifications for devices. The physical layer defines the relationship between a device and a transmission medium, such as a copper or optical cable.

Detailed explanation-2: -The physical layer is the layer closest to the physical connection between devices. This layer covers a variety of devices and mediums, among them cabling, connectors, receivers, transceivers and repeaters.

Detailed explanation-3: -Examples of layer 1 devices include hubs, repeaters & Ethernet cable connectors. These are the basic devices that are used at the physical layer to transmit data through a given physical medium which is suitable as per the network need.

Detailed explanation-4: -The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers data between nodes on a network segment across the physical layer.