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( 1) OSI seven-layer modelLayer function in OSI TCP/IP protocol family Application layer file transfer, e-mail, file service, virtual Terminal tftp,http,snmp,ftp,smtp,dns,telnet presentation layer data format, code conversion, data encryption no protocol session layer Release or establish contact with other Contacts No protocol Transport layer provides end-to-end interface TCP,UDP Network layer for packet s
check the router's routing table to find the next router to Pass the past, the IP packet re-encapsulation, to the physical layer, and then to the next router, repeat the above steps to check that the target IP is found Then encapsulate to the application layer to accept:Transport Layer:Segment upper-level data (divide the big data from the upper layer into a small piece of data)Establish an end-to-end connectionTransparent, reliable transmission (check for errors and correct errors or retransm
The linux OSI Layer-7 model, TCP/IP protocol stack, and the structure of each layer reveal big secrets. The osi protocol stack When I learn Linux, I know the OSI model even if I am a little cute. What ?! You don't know !!! Okay, this secret is taken away. Thank you ~~~ I,Two protocols (1OSI protocol model (layer-7) International ProtocolPDU: The data unit transm
OSI Layer-7 model basic knowledge and common application OSI Open Source Initiative (OSI for short, Open Source code Promotion Association, Open Source code organization) is a non-profit organization designed to promote the development of Open Source software. The full name of the OSI Reference Model (
layer here?The OSI model is a layered model, that is, it is divided into several parts, each of which is called a layer, each layer plays a fixed role, as seen in:650) this.width=650; "Src=" https://mmbiz.qlogo.cn/mmbiz/ iahl5mqlicpynj6o78bkudfel4pys77dv4niv6aastde8bioyfpm3y7lul0oicsou3pvlbch3s0wd5skocyezj6ca/0 "style=" Height:auto ; "alt=" 0 "/>OSI seven-layer model, we can see that the
1. Definition: OSI (Open System Interconnection), an Open System Interconnection Reference Model, which logically divides the network protocol into seven layers. Each layer has related and corresponding physical devices. For example, a conventional router is a layer-3 switching device and a conventional switch is a layer-2 switching device. The OSI Layer-7 model
Basic OSI Layer-7 model knowledge and common applications at each layer (1) OSI Open Source Initiative (OSI) is a non-profit organization designed to promote the development of Open Source software. The full name of the OSI Reference Model (OSI/RM) is the Open System Interc
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 layer
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 layer
is transmitted, and the circuit seems to be invisible to the transmitted bit stream. Data Link LayerThe data link layer, the second layer of the OSI model, is responsible for establishing and managing links between nodes. The main function of this layer is: through various control protocols, the error-prone physical channel becomes error-free and can reliably transmit data frame data link.The physical link is unreliable in the computer network due to
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 layer
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 layer
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 layer
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 layer
Source: Network Copyright: www.networkdictionary.com The OSI Open System Interconnection model is a reference model proposed by the International Organization for Standardization (ISO) in 1984. As a conceptual standard framework for network communication, this model makes it possible to conduct communication on networks formed by devices and application software of different manufacturers. Now, this model has become a major structural model for commun
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 layer
completed by different application protocols and programs of this layer, and the differences between different network operating systems in the functions, interfaces, implementation technologies, hardware support, security reliability and various application interfaces are very large. The main functions of the application layer are as Follows:User interface: The application layer is a direct interface between the user and the network, and the application and the network, allowing the user to in
frames from the upper layers, which are disassembled into the physical layer, and are also responsible for processing the acknowledgement frames sent back by the receiving end to provide reliable data transfer.Network layerThe network layer is the third layer of the OSI model, which is the most complex layer in the OSI Reference model and the highest level of co
function, interface, implementation technology, hardware support, security and reliability, as well as a variety of application interfaces and other aspects of the difference is very large. The main functions of the application layer are as follows:user interface: The application layer is a direct interface between the user and the network, and the application and the network, so that users can interact with the network interactively.implement a variety of services: This layer has a variety of
permissions is compromised; bodyAuthentication and session management is compromised; cross-site vulnerability to code execution, cache overflow vulnerability, pop-up vulnerability, error handlingImproper, unsafe storage, denial of service, unsafe configuration management. Network isolation must split the application protocol.All network attacks must reside on a layer of the network OSI model, otherwise it is not a network attack. Now that the TCP/IP
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