To go to the bank to do business examples:Network layer DDoS is to let the road to the bank become congested, unable to get the people who really want to go to the bank, often use the protocol as a network layer, such as TCP (using three handshake response to wait and limit the number of computer TCP connections), etc.The application
Layer-3 extension layer-7, layer-3 layer-7
In the process of data center cooperation, the idea of three layers (UI--BLL--DAL) is used to expand to seven layers, and SVN is used for cooperative development.
During development, da
3 basic points: deal with Distributed Denial of Service (DDoS) attacks
Distributed Denial of Service (DDoS) attacks are prevalent around the world, such as online banking, e-commerce, and official websites ...... No matter what kind of service is facing its threat. The main reason for DDoS flooding is that the cost
1. What is a three-tier architecture?Layer-3 development divides the entire business application of the system into the presentation layer-business logic layer-data access layer, which is conducive to system development, maintenance, deployment and expansion.Layering is to a
Simply put: Layer-1 switchOnly physical layer protocols are supported (one phone-controlled switch can be called ???)L2 SwitchSupports physical layer and data link layer protocols, such as Ethernet switches.L3 SwitchSupports physical layer, data link
From: http://www.juniperbbs.net/viewthread.php? Tid = 5859 extra = Page % 3d1% 26amp % 3 bfilter % 3 ddigest
The layer-2 switching technology is mature. The layer-2 switch is a data link layer device that can identify the MAC address information in the data packet and forw
1) layer-2 Exchange Technology
The layer-2 switching technology is relatively mature. The layer-2 switch is a data link layer device that can identify MAC locations in data packets.Address information, which is forwarded based on the MAC address, and the corresponding MAC addresses and ports are recorded in a local loc
The layer-2 switching technology is mature. The layer-2 switch is a data link layer device that can identify the MAC address information in the data packet and forward it according to the MAC address, the MAC addresses and corresponding ports are recorded in an internal address table. The specific workflow is as follows:
(1) When the switch receives a packet from
L2 exchange technology:The layer-2 switching technology is mature. The layer-2 switch is a data link layer device that can identify the MAC address information in the data packet and forward it according to the MAC address, the MAC addresses and corresponding ports are recorded in an internal address table. The specific workflow is as follows:
1) when the switch
Layer-3 architecture-rethink, layer-3 rethink
The third layer is over for a while, and I have summarized it above. In the previous article, I was wondering why I didn't knock on a login form for VB. NET.
Now, this blog shows you how to rethink about logging on to the form. I
1,Layer-3 forwardingYesRoute information is requiredThe route selection in the forwarding process determines the final egress of the message,L3 SwitchJust put thisRoute functions are integrated into the switch ChipGo.
2,Route SelectionExistExact matchAndLongest matchTwo methods.
2.1,Exact matchThat is, the destination IP address and the route address information must be completely consistent;
The layer-3 switch you know works like this. It works like a layer-3 switch.
Why do we say that the L3 forwarding performance of a layer-3 switch is much higher than that of a router? Sometimes it is mentioned in many books that
Configuration example of cisco router and layer-3 Switch environment, cisco layer-3 SwitchSimple environment configuration instance for cisco router layer-3 Switch
I. network topology:
Ii. configuration command:
1. vro Configura
The root of software complexity comes from the complexity of thinking.
Three-tier architecture look at three-tier DDD Implementation detailed architecture look at Code Business Domain persistent layer (data layer) testing and use example complete code download
Handy weapon Library:
For the tools involved in this article, see the previous article: My. Net w
Simple web layer-3 architecture system (fifth edition) and web layer-3 (Fifth Edition)
Next to the previous version, the three-tier architecture background code is almost finished today. After this version is completed, the front-end code is created. The front-end is not familiar and is still learning in depth. After a
Simple web layer-3 architecture system (3rd edition), web layer-3 Architecture
Today is the third edition. As we did a few days ago, we still need to optimize the code. The three-tier architecture is an idea. Whether the overall system security and high performance can be ensured depends on whether the code is properl
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