Youtor
Data Link Layer Physically attack
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=b767MHAdPMU
The Data Link Layer is the second layer in the OSI (Open Systems Interconnection) model, which is a conceptual framework used to understand and implement network protocols. The Data Link Layer is responsible for node-to-node data transfer, error detection and correction, and framing of data packets. • Key Functions of the Data Link Layer: • Framing: The Data Link Layer encapsulates the network layer data into frames. A frame is a packet of bits that includes not only the raw data but also important information such as addresses, error detection, and control information. • Physical Addressing: It assigns a physical address (MAC address) to the frames. This address is used to identify devices on the same local network. • Error Detection and Correction: The layer provides mechanisms to detect and sometimes correct errors that may occur during the transmission of frames over the physical layer. This ensures the integrity of data as it travels from the source to the destination. • Flow Control: It regulates the pace at which data is sent. If the sender is sending data too quickly for the receiver to handle, the Data Link Layer can apply flow control to prevent data loss. • Access Control: In networks where multiple devices share the same communication medium (like Ethernet), the Data Link Layer ensures that data is transmitted without collisions. This is achieved through protocols like CSMA/CD (Carrier Sense Multiple Access with Collision Detection). • Medium Access Control (MAC): This sublayer of the Data Link Layer is responsible for controlling how devices on the network gain access to the medium and permission to transmit data. • Sublayers of the Data Link Layer: • Logical Link Control (LLC): Handles error checking and frame synchronization, providing a reliable link. • Media Access Control (MAC): Manages protocol access to the physical network medium. • Common Protocols: • Ethernet: A widely used protocol in local area networks (LANs) that defines wiring and signaling standards for the physical layer and frame formats for the Data Link Layer. • Wi-Fi (IEEE 802.11): Defines how wireless devices communicate and includes Data Link Layer protocols for error checking, framing, and access control. • Example: • In an Ethernet network, when a device wants to send data to another device on the same network, the Data Link Layer encapsulates the data into a frame, includes the MAC addresses of the sender and receiver, and transmits the frame over the physical medium. The receiving device's Data Link Layer then checks the frame, detects any errors, and if the frame is valid, passes the data up to the network layer. • ■ Source : https://www.iana.org/assignments/prot... • ■ @Cyber Defence360 Admission Link : / 1182079446105682 • ■ https://docs.google.com/forms/d/e/1FA... • ■ Facebook Page Link : https://www.facebook.com/profile.php?... • ■ Personal Github Link : https://github.com/labibhossen • ■ Personal Linkdin : / labib-hossain-88ab5821b • ■ Personal Facebook Page : https://www.facebook.com/profile.php?... • ■ Telegram link : https://web.telegram.org/a/#-4258075879
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