Responsibility chain mode: pay attention to encapsulating object responsibilities, support changes in responsibilities, and realize transaction processing by dynamically constructing responsibility chains.王哥。According to the above introduction, DDoS attacks need to obtain a large number of broilers, but it is becoming more and more difficult to obtain broilers. Is there any way to attack a large number of broilers without controlling broilers? DRDoS (Distributed Reflection Denial of Service), an attacker will not send the request directly to the attacker, but will send it to a third party through which to transfer it to the attacker, which is the embodiment of "Reflection". Its process is as follows: the attacker tampers the source IP of the request packet with the IP to be attacked, and the target IP is the third-party IP, then the target IP of the third-party recovery message becomes the IP of the attacker, thus the attacker will receive a large number of requests and the service is unavailable.PS: Many forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated. Maybe Microsoft will launch a new SOA implementation scheme at that time. Wouldn't it be a waste of time to learn in depth, so they feel that there is no need to learn in depth and just know how to use them. I had the same feeling about this problem before, but now I think that although WCF technology may be replaced, the key to understanding a technology in depth is not to know some more advanced API calls, but to understand its implementation mechanism and way of thinking. Even if the latter technology is replaced, the mechanism behind it is definitely similar. Therefore, if you have a thorough understanding of a technology, you will feel familiar with the new technology and relaxed about it. In addition, after you have a thorough understanding of a technology, you dare to say that you have mastered the technology well during the interview, instead of saying that you use it a lot at ordinary times. Once you ask deeply, you do not know the implementation principle behind it. This is also why I want to write WCF series. I hope this opinion is helpful to some beginners.香荽扭着双手对娘笑道：娘。The local people of my age pondered for a moment and said this sentence:Mr. Sun Yimin's guidance to the practice team is not only reflected in practice, but also in the safety, life, study, life and other aspects of the team members. When this activity was slightly conceived, Mr. Sun repeatedly stressed with the captain the safety of the team members' stay in school, the transportation mode and route for two days out, etc. The teacher also repeatedly asked about the cost of this activity, and was very worried that some classmates would have family difficulties and could not afford the cost. On the day before the start of this summer's social practice activity, the team leader and vice-captain were worried that the content of the activity was not full enough. Teacher Sun Yimin immediately built a bridge for the team and introduced the team to Dalongfang Science Park. Within 9 days before and after the activity, two days of pre-contact and three days of probation, Mr. Sun Yimin took out the whole three days to accompany the team to three probation bases to accompany and guide the activity. Before and after each activity, in order to make the team members better transform what they have learned in practice into their own abilities, Mr. Sun Yimin encouraged the team members to actively ask questions and establish contact groups with successful people they met during the probation process, so as to facilitate better communication between the team members and role models.
