example of flood

Flood Filling Algorithm (flood fill algorithm) Flood filling algorithms, also known as flood filling algorithms, are commonly used in many graphic rendering software. The paint bucket function of Windows paint. The principle of the algorithm is very simple, that is, from a point near the pixel, fill into a new Until al

There are two main ways to realize flood simulation: one is based on the hydrodynamic model of flood evolution, and the other is the flood inundation analysis based on Dem. The specific analysis is as follows:I am a GIS practitioner, from our professional point of view, choose Dem-based flood analysis to do

What does the power of the primitive mean: Ancient cloud: The World Xuan Huang, the universe is immemorial. Legend has it that when the world was first opened, there was once a great flood that almost destroyed the whole Earth. Therefore, the power of the primitive is such as to destroy the world when the Earth is first opened. The source of the power of the primitive August 8, 2016, Rio Olympic women's 100-meter backstroke semi-final, Chinese cont

Attack principle: SYN Flood is one of the most popular DoS (Denial of Service Attack) and DDoS (Distributed Denial of Service Attack) methods, send a large number of forged TCP connection requests, and send the first handshake packet (SYN Packet) of a massive request connection from a counterfeit IP or IP segment ), the attacked server responds to the second handshake packet (SYN + ACK packet). because the other party is a fake IP address, the other p

Java Study Notes-before the 0918 class flood event in Silicon Valley *: before coming to Beijing, just like all college students, they worried about the next step in their lives. Before the 0918 class flood event In many cases, you often do not know what will happen in your life in the next minute. Maybe you are still wandering in the first second, but you may gain hope in the next second. Before coming to

, Compared to the first 24 digits of the confirmation number, if the same, it is not modified, the connection is valid, and then the server completes the connection creation process. Syn-cookie technology can effectively defend the SYN flood attack because it does not need to save any information on the server side during the connection establishment, and realizes the stateless three times handshake. But there are some weaknesses in the approach. Sinc

, the design of reflective attacks more ingenious. In fact, the way three of the attack mode is the first two models of the combined version and the upgrade version, mode three attack strategy is a bit like "diehard", the reflection attack no longer directly to the target host, but instead of the other group of hosts mistakenly to send them the ICMP request packet, Then a group of hosts sends an ICMP response packet to the destination host, causing flooding from all directions to overwhelm the d

, it indicates that it has not been modified and the connection is valid. Then, the server establishes the connection. Syn-Cookie technology implements stateless three-way handshakes without storing any information on the server during connection establishment, thus effectively defending against SYN flood attacks. However, this method also has some weaknesses. Because cookie computing only involves part of the packet header's confidence, during the co

bits). The cookie is re-calculated on the server end, which is compared with the first 24 bits of the confirmation number. If it is the same, it indicates that it has not been modified and the connection is valid. Then, the server establishes the connection. SYN-cookie technology implements stateless three-way handshakes without storing any information on the server during connection establishment, thus effectively defending against SYN Flood attacks

The most characteristic of ICMP protocol is the nature of ICMP flood. In this regard, we will give a detailed introduction. See what forms of ICMP flood are available. Below are some simple examples to help you analyze them. ICMP flood in different ways 1. Direct ICMP flood The first condition to do this is that your b

CISCO router as an example, the IOS software in a Cisco router has many features to prevent DoS attacks and protect the security of the router itself and its internal network. Use extended access list Extended access list is an effective tool to prevent DoS attacks. It can be used to detect the type of DoS attacks and prevent DoS attacks. The Show IP access-list command displays matching data packets for each extended access list. Based on the data p

Source: http://soft.yesky.comDenial of Service (DoS) attacks are widely used by hackers. They exclusively occupy network resources and prevent other hosts from accessing them normally, resulting in downtime or network breakdown.DoS attacks include Smurf, SYN Flood, and Fraggle. In Smurf attacks, attackers use ICMP packets to block servers and other network resources; SYN Flood attacks use a large number of

I learned some useful techniques about vro protection. So I studied the problem of vro protection and shared it with you here. I hope it will be useful to you. Denial of Service (DoS) attacks are widely used by hackers. They exclusively occupy network resources and prevent other hosts from accessing them normally, resulting in downtime or network breakdown. DoS attacks include Smurf, SYN Flood, and Fraggle. In Smurf attacks, attackers use ICMP packets

the currently filled area, and some precautions. Hatching is used to re-fill existing filling polygon in the current session, without re-calculating the filling area. Each time you open a design file, you should perform flood or hatch on the design; this information is not saved. In most cases, you only need a simple hatch. When you modify the copper polygon, it will cause a rule conflict, or when you modify the spacing rule, use

Crude CC attack-HTTP Flood HTTP Flood is an attack on Web Services in Layer 7 protocol.Hazard: Simple attack methods, difficult defense and filtering, and huge impact on hostsAttack method: HTTP Flood attacks do not need to control a large number of bots. Instead, they use port scanning programs to search for anonymous HTTP proxies or SOCKS proxies on the Interne