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What is the function of Data Link Layer in SCADA communication protocol: OSI seven-layer model?

What is the function of Data Link Layer in SCADA communication protocol: OSI seven-layer model? Correct Answer It establishes and terminates a connection between two physically-connected nodes on a network.

OSI Model of SCADA:

  • Networks are quite complex.
  • The OSI, or Open Systems Interconnection, model is used to understand how networks or systems operate.
  • It is best to look at it based on the seven layers.
  • The seven layers are the physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer.
  • OSI model is down into seven layers, focusing on one specific layer makes it easier to understand how systems communicate.
     

Data Link Layer:

  • The data link layer ensures that all packets of information are passed on free of errors.
  • It makes sure the appropriate physical protocol is assigned to the data.
  • The data link layer is the second layer in the OSI Model.
  • It establishes and terminates a connection between two physically-connected nodes on a network.
  • The three main functions of the data link layer are to deal with transmission errors, regulate the flow of data, and provide a well-defined interface to the network layer.
  • When it transfers the data to the network layer, it uses timers and sequence numbers to check for errors to ensure that all data is successfully received.
  • The data link layer has different services and protocols to complete its tasks. The protocols are the rules required to pass data successfully to the next layer.

Related Questions

Consider the following statements regarding the OSI model: 1. Application layer provides the control structure for communication between applications; establishes, manages and terminates connections between cooperating applications. 2. Data link layer provides for the reliable transfer of information across the physical link. 3. Transport layer provides end-to-end error recovery and flow control of data. Which of the above statements are correct?
Consider the following three statements about link state and distance vector routing protocols, for a large network with 500 network nodes and 4000 links. [S1] The computational overhead in link state protocols is higher than in distance vector protocols. [S2] A distance vector protocol (with split horizon) avoids persistent routing loops, but not a link state protocol. [S3] After a topology change, a link state protocol will converge faster than a distance vector protocol. Which one of the following is correct about S1, S2, and S3?
Some small cubes of same height 7 cm but variable length and width are put inside a large cuboid of height 21 cm. Length and width of cuboid is 32 cm and 24 cm, respectively. Small cubes are put such that cubes at the bottom most layer is of similar base area; second layer contains all the cubes of similar base area and third layer have all the cubes of similar base area. Which of the following statement(s) given below is / are TRUE? A: If side of each small cubes at bottom most layer is 8 cm, then maximum number of small cubes that can be put at bottom most layer is 12. B: If maximum of 48 cubes can be put at second layer, then side of each cube at second layer is 6 cm. C: If side of each small cubes at third layer is 1.6 cm, then maximum number of small cubes that can be put at third layer is 300.
Which layer will come in between the transport layer and the data link layer in the OSI model? 
Why does the data communication industry use the layered OSI reference model?
1. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.
2. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.
3. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers.
4. It encourages industry standardization by defining what functions occur at each layer of the model.
Consider the statements given below and select the correct statement(s)
1. Computer-mediated communication (CMC) is defined as any human communication that occurs through the use of two or more electronic devices.
2. Computer-mediated Communication can be broken down into two forms i.e. synchronous and asynchronous.
3. Synchronous computer mediated communication refers to communication which occurs in real time.
4. Asynchronous computer mediated communication refers to communication which takes place when the parties engaged are not communicating in unison.
Which of the following set of statements are correct for describing the human communication process?
1. Non-verbal communication can stimulate ideas.
2. Communication is a learnt ability.
3. Communication is not a universal panacea.
4. Communication cannot break down.
5. More communication means more effective learning by students.
6. Value of what is learnt through classroom communication is not an issue for students.
Select the correct answer
The DoD model (also called the TCP/IP stack) has four layers. Which layer of the DoD model is equivalent to the Network layer of the OSI model?
Which of the following describe the DHCP Discover message?
1. It uses FF:FF:FF:FF:FF:FF as a layer 2 broadcast.
2. It uses UDP as the Transport layer protocol.
3. It uses TCP as the Transport layer protocol.
4. It does not use a layer 2 destination address.
Which of the following statements are true?
Statement I Big data refers to no precise quantity, but generally refers to data in the range of Petabytes and Exabyte, i.e. billions to trillions of records, all from various sources. Big data is generated much faster. than traditional data in much larger quantities.
Statement II Big data interests industries because they are able to learn more patterns and curious variances than smaller data sets, with the capability to provide valuable insights into consumer behaviour, weather systems, financial market activity, or other phenomena.
Statement III Various departments and product lines use various applications within most organisations and store data in separate datasets. These separate databases may contain similar data, but data from one data base to another is not always consistent. This is called data silo.