osi layer protocols and functions

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

the details. A more troubling question is how do you keep the 7 layers in order, without missing them? the netizen of the Big brain move opens a lot of memory formula (do not know which you like?) ）：1. All People Seem To Need Data PRocessin G2.PLeaseDoNotTellS tupid PeopleAnything3. Please Do Not Take sAles People ' s advice4. pLease Do Not Throw Sausage PIzza A-To5. PLease Do Not T each Students Pointless C11>acronyms Finally, we show that the top level of the seven

Friends who are interested in network programming may have heard of the OSI seven layer model, and the next one is a diagram of the entire protocol implemented under Windows. Implementation structure of the OSI seven layer model under Windows +-------------------------------+ | Ws2_32.d

The OSI Layer-7 model is easy to understand and can't be remembered many times. I read it again today and found that it is more logical and easier to remember to look at the problem from the perspective of historical deduction. This article is not necessarily rigorous and may be flawed. It mainly serves to help people with poor memory. In general, the OSI model i

In this topic, we will discuss network security from the perspective of OSI hierarchy. We will study the OSI stack in depth from the physical layer to the application layer. Starting from analyzing vulnerabilities at each layer, this paper assumes the various possibilities o

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 commu

host scan discovery via OSI layer three (network layer)OSI The third layer of the model is the data link layer, where the protocols that work primarily are IP and ICMP. You can use diff

[TechTarget China original] OSI Mode layer 4th is the transport layer, which is located in the middle of the OSI Mode. This chapter describes fingerprint recognition and its relationship with the transport layer. Fingerprint recognition is an operating system (OS)-level func

between a-B and the reliability of the connection4) package The data at the network layer and define the destination IP address and source IP address in front of the packaged data5) Reprocessing at the data link layer, the data mask after processing defines the target Mac and source MAC address6) Re-physical layer, eventually changing the data to machine and ide

, intuitive, and efficient. Due to the large amount of information transmitted by digital videos and limited bandwidth, the compression and encoding of videos, selection of transmission channels and network protocols, and IP Multicast technology (IP Multicast) software Implementation Based on the Windows operating platform has become a key technology in network-based digital video transmission applications. Among them, the choice of transmission chann

transmission protocol selection is concentrated on the transport layer We know that the OSI (Open System Interconnection) network reference model developed by ISO divides the network into seven layers, which are listed in the following order: physical Layer, data link layer, network

Network Layer 2 (IPv4 and IPv6 addresses and related protocols) IP (internet protocol) protocol is the core protocol of the TCP/IP protocol family and the network layer of the internet. The current version number is 4, also known as IPv4. The next generation IP protocol version number is 6, that is, IPv6. As described in the network

transmission, you can temporarily connect to Port 20 of the FTP server and use this port for data transmission. FTP transmission mode: ASCII transmission mode and binary transmission mode. The difference between the two lies in whether the data is interpreted. The ASCII mode interprets the data, while the binary mode copies data one by one.3. Telnet protocol Telnet is one of the earliest remote logon protocols.You can log on to a remote computer on the local machine using the Telnet protocol.

We all know that networks are divided into different layers. In the application layer, some application layer protocols protect our e-commerce systems. In this regard, let's talk about the relevant content. It is an important issue for e-commerce to handle e-commerce on the Internet and ensure the security of data transmitted between buyers and sellers. To overco

Some of our commonly used network applications, such as e-commerce, are implemented at the network application layer. So how can we ensure security in the application layer protocol? In this regard, we will mainly discuss the SET protocol. First, let's take a look at the security protocol environment on the Internet. It is an important issue for e-commerce to handle e-commerce on the Internet and ensure the

-7, it also includes the upper and lower layers. We have previously introduced the TCP/IP protocol. its correspondence with the layer-7 model is as follows:Relationship between OSL and TCP/IP model (figure 2)Application Layer *Presentation layer application layerSession Layer *Transport LayerNetwork LayerData link

Layer 7 of OSI is 7 Application Layer 6 presentation layer 5 Session Layer 4 Transport Layer 3 network layer 2. Data Link Layer 1 Physical