implemented on the terminal system, instead of on the network router. The network router only acts on the network layer field of 3-PDU, not the transport layer field.
Figure 1 layer-7 network protocol model transport layer provides logical rather than physical communicat
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 layer, transmission
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
Computer network is more and more important in today's life, so we learn the network knowledge is very necessary. Network communication is divided into 5 layers, namely: physical layer, Data link layer, network layer, Transport layer, application layer.In the data link layer
program (customer service sends the number of operations, operands, operators, and the server receives the data to end to the client):
The customer service side is connected to the server side and passes the operands in 1-byte integers as a number.
Each operand that the customer service side passes to the server is a 4-byte integer data.
After each operand is passed, the operator is then passed, and the operator occupies 1 bytes.
The server returns the result of the operati
OSI 7-layer models corresponding to each layer of the OSI model OSI reference model data encapsulation process OSI reference model VS TCP/IP Reference Model TCP/IP layer corresponding to each layer of the protocol TCP/IP Layer the
OSI Layer-7 network model and TCP/IP layer-4 Network Model
Original by Mu ant
Community Www.mumayi.net, this post address: http://bbs.mumayi.net/viewthread.php? Tid = 932283
1. OSI network layered Reference Model
Network Protocol designers should not design a single, huge protocol to provide complete details for all forms of communication, but should divide c
TCP/IP layer-4 model and OSI Layer-7 ModelTable 1-1 is the table corresponding to the TCP/IP layer-4 model and the OSI Layer-7 model. We map the OSI Layer-
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 Interconnection Reference Model (OSI/RM ), it is a network system interconnection model proposed
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 (
same layer through the Protocol to achieve peer-to-peer inter-layer communication OSI/RM layered structure the essence of peer-layer communication during inter-layer communication: virtual Communication between peer-layer entities; the lower
filtering in server responses, and content insertion.
Another feature that is often mentioned is security. The most common SYN Flood attack in the network, that is, hackers control many source clients and use fake IP addresses to send SYN attacks to the same target. Generally, such attacks send a large number of SYN packets, use up relevant resources on the server to achieve the purpose of Denial of Service (DoS.
From the technical principle, we can also see that in
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
0SI layer-7 protocol: Transmission Layer AnalysisThe lower layer of 0SI is mainly for data communication, the higher layer of 0SI is for users and information processing. The transport layer is located between the lower and higher
reuse the input of data streams of different applications on the same host, it also includes the re-sorting function for packets that are not in the correct order. Example: TCP, UDP, and SPX.
(5) network layer: This layer defines the end-to-end packet transmission. It defines the logical addresses that can identify all nodes, and also defines the routing implementation and learning methods. To adapt to the
communication parties must adopt the same protocol in the Peer layer and define the same data identification format, so as to ensure the correct transmission of data.OSI and practical application modelThe layer-7 model is a theoretical model, and its practical application is ever-changing. It is entirely possible to have variations. For most applications, we jus
at the four protocol layers of the TCP/IP layered model:Layer 1: Network Interface LayerIt contains the protocol used to transfer the IP address data on an existing network medium. In fact, TCP/IP standards do not define functions that correspond to the ISO data link layer and physical layer. Instead, it defines a protocol like Address Resolution Protocol (ARP) that provides interfaces between the data str
at the four protocol layers of the TCP/IP layered model:Layer 1: Network Interface LayerIt contains the protocol used to transfer the IP address data on an existing network medium. In fact, TCP/IP standards do not define functions that correspond to the ISO data link layer and physical layer. Instead, it defines a protocol like Address Resolution Protocol (ARP) that provides interfaces between the data str
at the four protocol layers of the TCP/IP layered model:Layer 1: Network Interface LayerIt contains the protocol used to transfer the IP address data on an existing network medium. In fact, TCP/IP standards do not define functions that correspond to the ISO data link layer and physical layer. Instead, it defines a protocol like Address Resolution Protocol (ARP) that provides interfaces between the data str
completed at the four protocol layers of the TCP/IP layered model:Layer 1: Network Interface LayerIt contains the protocol used to transfer the IP address data on an existing network medium. In fact, TCP/IP standards do not define functions that correspond to the ISO data link layer and physical layer. Instead, it defines a protocol like Address Resolution Protocol (ARP) that provides interfaces between th
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