application layer ddos

Application Layer 1. The only user-oriented layer provides users with frequently-used services 1) email 2) www 3) QQ ...... there are many more 2. common protocols: 1) Hypertext Transfer protocol HTTP 2) File Transfer Protocol FTP 3) Simple Mail Transfer Protocol SMTP 4) Domain Name System DNS 5) Remote logon protocol Telnet 6) simple Network Management Protocol

There are many things worth learning about layer-3 switches. Here we mainly introduce the application of the new technology of layer-3 switches. CrossBar (CrossPoint) is called a cross-switch matrix or a horizontal-exchange matrix. It is recognized as the preferred switching network structure for building large-capacity systems. The three exchange structures are

functions of the NIC is to perform serial/parallel conversion. Because the data rate on the network is not the same as the data rate on the computer bus, the memory chip that caches the data must be installed in the NIC.The protocol stack (Protocol stack) refers to the sum of the protocols in the network, and its image reflects the process of file transfer in a network: from the upper layer protocol to the underlying protocol, and then from the under

About the network we have discussed today, the entire network framework we have built up. We say the data link layer, the network layer, the transport layer, in fact, the application layer is on the basis of our discussion before the use of these layers, I intend to illustra

issues that may occur with TCP long connections 1. Many firewall routers and so on for the free socket auto-shutdown 2. For non-normal disconnection, the server is not able to detect. In order to reclaim resources, a detection mechanism must be provided. So, there is the heartbeat (HeartBeat) mechanism. two implementation schemes of heartbeat mechanism For now, there are two ways to implement TCP keepalive (industry status is almost the first one in IM) 1. The heartbeat mechanism implemented by

2.1 application layer protocol principles Client Server Architecture The application layer protocol defines how application processes running on different end systems transmit packets to each other. Switch packet type, packet type syntax, field meaning, process time, how to

How does the application layer get the picture information from the bottom-up independent picture architecture service? Reply content: How does the application layer get the picture information from the bottom-up independent picture architecture service? Should be provided by the underlying storage services suc

Netfilter/layer7By default, NetFilter can filter only two or three or four layers of data, but the application layer of data (such as QQ, thunder video, etc.) is not filtered out. We also know that NetFilter is working in the kernel, so the data that NetFilter supports filtering LAYER7 application layer protocols must

This article analyzes Linux 1.2.13 Original works, reprint please mark http://blog.csdn.net/yming0221/article/details/7541907 For more please refer to the column, address http://blog.csdn.net/column/details/linux-kernel-net.html Author: Yan Ming Note: "(top)", "(bottom)" in the title indicates the data packet transmission direction in the analysis process: "(top) "indicates that the analysis is from the bottom up," (bottom) "indicates that the analysis is from the top down. In the previous blog

After one month of study, from the access to Silverlight to the completion of a first-class application framework, it is indeed quite tired. Originally, the bottom layer was quickly finalized, but due to the long debate during the selection, it took some time, while I was only responsible for the bottom layer, but due to the slow progress of the client team (the

Previous Article: Preface to Application Framework Design Do you still remember the conflict between fat clients and thin clients that started around 97 years ago? Then there is a battle between CS and BS, and then a battle between two and multiple layers ..., ten years later, let's look back at these arguments. Everything seems to be so justified: How can programs not be layered? However, it took us ten years to reach a multi-

The application layer protocol at the top of the protocol stack defines how application processes running on different end systems pass messages to each other. The definition reads as follows:1. Type of message exchanged. Request messages and response messages.2, various types of message syntax, such as the various fields in the message and how these fields are d

This article is the second part of the implementation of the DDD framework, mainly introduces the realization of the application layer of DDD, and explains the service and assemble responsibilities and implementation in detail. A github address is attached at the end of this article. Compared to the shipping system example in the original book of domain-driven design, the business scenario for social servic

Chengdu Neusoft Information Technology Vocational College (Level 04) Apply layer network packet capture using Hook Technology Class: Class 2 of Visual ProgrammingINSTRUCTOR: Li DanStudent ID: 04311110210 Name: Liu Haiping Abstract Packet capture (interception) technology is mainly used in information security-related fields, especially firewall technology. With the development of the online game industry, many plug-ins for different games emerged. The