pdu osi

The OSI Layer-7 model enables reliable communication between different networks of different systems through seven hierarchical structural models. Therefore, its most basic function is to help different types of hosts transmit data. The node that completes the relay function is usually called a relay system. In the OSI Layer-7 model, the relay systems at different layers have different names. The layer at

OSI (open System Interconnection), open Systems Interconnect Reference Model. From bottom to top seven-tier model features and their representative protocols: Physical Layer (physical) : Specifies the mechanical, electrical, functional, and process characteristics that activate, maintain, and close communication endpoints. This layer provides a physical medium for the upper level protocol to transmit data. bit, bit. Typical protocol representative

The OSI seven-layer model enables reliable communication between different networks of different systems through seven hierarchical structural models, so its main function is to help different types of hosts achieve data transfer.The nodes that complete the relay function are often referred to as trunking systems. In the OSI seven layer model, the relay systems at different tiers have different names.The le

(single-choice) repeaters, Ethernet switches, routers work at which level of the OSI model: (4 points) A. Physical layer, link layer, network layer B. Physical layer, network layer, link layer C. Physical layer, link layer, Transport layer D. Link layer, link layer, network layer Analytical: Physical layer: Converts data into electronic signals that can be transmitted through physical media equivalent to a porter in the post office Data Link la

ISO/OSI network models have been porting Android video codec recently. I haven't written a blog for a long time. I want to write something about the network. I first introduced the ISO network model to my shoes. First, I will draw a picture for your understanding. Www.2cto.comBased on the reference model diagram above, I will explain each layer of the ISO/OSI reference model as follows: 1. If two computers

OSI reference model and troubleshooting The bottom layer of the OSI reference model provides services for its upper layer. Therefore, troubleshooting should also be performed from the bottom layer to the upper layer. If you are an IT support staff member of a company and an employee calls to say that the webpage cannot be opened, what should you do? 1) physical layer check. First, check whether the netwo

Regular Test of preliminary roundFirst, we need to know the correspondence between the two models.There is a very good picture:Then we select the more detailed OSI model to easily understand the analysis(1) Physical layer: mainframe and the like(2) Data link layer: Signal walking route (network cable, etc.)(3) Network layer: The path from the host to the place where the signal is to go(4) Transport layer: the signal goes through the process of each se

Reasons for the existence of the OSI model (open System interconnection):The network model is built so that the builders of the network can build networks that can communicate and work with each other, and describe the transmission of data from one computer to another on a network.1.physical LayerDefines the electronic and functional aspects of the connection between the end systems, including voltage levels, physical distances, transmission rates, an

This section summarizes the overall framework of network communication and its underlying process. We have learned about the creation and application of sockets, in fact, we are only using sockets this tool, the underlying details of which we are shielded. To complete the data transmission through the Internet, in fact, not only software can be solved, but also need to build hardware systems. Therefore, in order to solve this problem, many experts gathered together, these people are har

In the OSI Reference Model, from bottom to top, each layer accomplishes different, targeted functions. 1. Physical layer (physical layers)The physical layer specifies the mechanical, electrical, functional, and process characteristics that activate, maintain, and close communication endpoints. This layer provides a physical medium for the upper level protocol to transmit data. in this layer, the unit of data is called the bit (bit). Typical canonical

1.1Network layering This course mainly introduces two different layers:OSILayered Model andCiscoLayer-3 model.Advantages of layering:1. Divide complex networks into layers that are easier to manage.2. When a layer is changed, other layers are not affected, which makes the applicationProgramDevelopers can perform specific design and development.3. In today's network environment, no manufacturer can provide a complete set of solutions and all devices, and define a standard interface in a multi-

In the Iso/osi reference Model, the main function of the network layer is () the correct answer: a your answer: a(correct)Route selection, congestion control and network interconnectionProvides a reliable end-one service that transparently transmits messagesData format transformation, data encryption and decryption, data compression and recovery Add notes Collection Error correcting OSI