What is the physical layer?
Computer networks are designed based on standard protocols and communication layers. These network standards are usually derived from the model of open standards (OSI). Each layer within the communication standard is designed for a specific purpose and process. The physical layer is a real hardware layer of communication network. This layer defines the wire clip configuration and physical design for copper wires in network cables.
When a computer message is sent via a physical layer, it requires a special coding process. This is where computer information is transformed from data bits into electronic signals that are interpreted through network hardware. It is considered to be the lowest level of the network tank because it is responsible for sending a real message via a network hardware device.
Each type of network design has a specific frequency and protocol. The network cable is responsible for converting communications to electronic signals. Physical layer dEfines the specification of an electronic signal that is transmitted by a network cable. This includes predefined frequency and cable length, which ensures proper communication between devices.
The physical layer is not limited to the configuration of copper wire. It also includes wireless and optical fiber specifications. The definition is to outline how computer programs should transmit messages between computers using specific frequencies and protocols.
In addition to the transmission protocol, the physical layer also defines how to correctly receive a message. This defines how the network device should interpret signals from another device in the network. The sender and the message receiver must follow the protocols to ensure the receipt of data packets passed through the network.
The network sells a similar telephone system. A specific wire is used for a headset, while another wire is used for the microphone. There are messages within the networktransmitted to a specific frequency and accepted by a monitoring device. Upon receipt of the message, a message of sending a transmission device is sent to a message confirming the message.
The physical layer also contains standards to ensure quality and receiving messages receiving devices. The recovery of the clock is an example of the standard to confirm receipt of messages in the physical layer. The clock recovery system is a predefined time in which the message must be received and answered in the network. If the receiving application does not submit a confirmation message during the predefined duration, the sending device assumes that the message has failed.