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HDLC
HDLC (Hierarchical Data Link Control) is a standard communication protocol for local area networks (LANs). It is responsible for managing the flow of data b...
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HDLC (Hierarchical Data Link Control) is a standard communication protocol for local area networks (LANs). It is responsible for managing the flow of data b...
HDLC (Hierarchical Data Link Control) is a standard communication protocol for local area networks (LANs). It is responsible for managing the flow of data between devices on the network, including computers, printers, and other equipment.
HDLC operates on the basis of a layered approach. It consists of several components working together to ensure reliable data transfer between devices. These components are:
Physical layer: responsible for physical transmission of data through cables or wireless media.
Data link layer: responsible for data formatting, error detection, and flow control.
Network layer: responsible for routing data packets across the network.
Transport layer: responsible for end-to-end data transfer between devices.
HDLC uses a token ring topology, which consists of a central hub that connects all devices in the network. The hub acts as a bottleneck, ensuring that only one device can transmit or receive data at any given time.
HDLC operates in two modes:
Passive mode: in which the hub simply passes data frames between connected devices.
Active mode: in which the hub proactively sends data frames to connected devices.
HDLC is commonly used in LANs due to its simplicity, efficiency, and reliability. It is a widely supported protocol that is implemented by most major computer manufacturers and network devices