Where is the data link connector located?
The OBD II DLC is usually located under the instrument panel on the driver side, though there are several exceptions. The OBD-II connector is required to be within 2 feet of the steering wheel (unless an exemption is applied for by the manufacturer, in which case it is still somewhere within reach of the driver).
What is the purpose of a data link connector?
The data link connector (DLC) is the multi-pin diagnostic connection port for automobiles, trucks, and motorcycles used to interface a scan tool with the control modules of a given vehicle and access on-board diagnostics and live data streams.
What is meant by data link layer?
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. The data link layer provides the functional and procedural means to transfer data between network entities and may also provide the means to detect and possibly correct errors that can occur in the physical layer.
What is Mac in data link layer?
The medium access control (MAC) is a sublayer of the data link layer of the open system interconnections (OSI) reference model for data transmission. It is responsible for flow control and multiplexing for transmission medium. It controls the transmission of data packets via remotely shared channels.
What is the data link control?
A data link control is a service that ensures reliable network data communication by managing frame error detection and flow control. DLC is based on the Data Link layer of the OSI model. DLC handles the following tasks: Reliable link packet transmission.
What is the main function of a data link content monitor?
What is the main purpose of a data link content monitor? to determine the type of switching used in a data link.
What are the two types of data link protocol?
Examples of Data Link Layer Protocols
- Synchronous Data Link Protocol (SDLC) –
- High-Level Data Link Protocol (HDLC) –
- Serial Line Interface Protocol (SLIP) –
- Point to Point Protocol (PPP) –
- Link Control Protocol (LCP) –
- Link Access Procedure (LAP) –
- Network Control Protocol (NCP) –
What are the services provided by data link control?
The main responsibility of the Data Link Layer is to transfer the datagram across an individual link. The Data link layer protocol defines the format of the packet exchanged across the nodes as well as the actions such as Error detection, retransmission, flow control, and random access.
Which of the following is the responsibility of data link layer?
The data link layer is responsible for logical link control, media access control, hardware addressing, error detection and handlingand defining physical layer standards. It provides reliable data transferby transmitting packets with the necessary synchronization, error control and flow control.
Which is not work of data link layer?
2. Which of the following tasks is not done by data link layer? Explanation: Channel coding is the function of physical layer. Data link layer mainly deals with framing, error control and flow control.
What are two services performed by the data link layer?
Specifically the data link layer performs two basic services: It accepts Layer 3 packets and encapsulates them into frames. It provides media access control and performs error detection.
Which two functions are performed at the LLC sublayer of the OSI data link layer?
Adds Layer 2 control information to network protocol data. Places information in the frame that identifies which network layer protocol is being used for the frame. Performs data encapsulation. Controls the NIC responsible for sending and receiving data on the physical medium.
What are the two sublayers of the OSI model data link layer?
The data link layer (Layer 2) of the OSI model actually consists of two sublayers: the Media Access Control (MAC) sublayer and the Logical Link Control (LLC) sublayer. The MAC sublayer controls device interaction. The data link layer combines data bits into entities called frames.
What is contained in the trailer of a data link?
The trailer in a data-link frame contains error detection information that is pertinent to the frame included in the FCS field. The header contains control information, such as the addressing, while the area that is indicated by the word “data” includes the data, transport layer PDU, and the IP header.
What is header and trailer records?
The header record contains information to identify the data in the file and the length of the data records. The trailer record contains a record count of the actual number of data records, not including the header and trailer records, in the file.
What are header and trailers and how do they get added and removed?
What are header and trailers and how do they get added and removed? Each layer in the sending machine adds its own information to the message it receives from the layer just above it and passes the whole package to the layer just below it. This information is added in the form of headers or trailers.