Network Useful Knowledge
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CDN(Content Delivery Network)
CDN is just what we call Content Delivery Network, and it can make the user connect with the remote target ip by using your local server. The basic idea of it is to copy all the needed data in the local server, and the users can just the their information by connecting with the local fast server.
For example, if you are a student in Xi’an Jiaotong University. you want to obtain your postgraduate entrance examination in BeiJing University, but the connection is so far that sometimes may be unreachable as there are so many people using it. Then you can just copy the data in Bei Jing University and make the virtual ISO in Xi’an, then you can use it smoothly and fastly.
VPN(Virtual Private Network)
VPN is the network connector which can help users to get connected
with the ideal server with security. VPN has three functions for
Chinese:
- Unblock. We can use VPN to change the routing of the blocked website and directly connect with the ideal server.
- Ensure security all the way between your terminal and VPN.
- Get the resource of the target server. For example, I’am in Beijing, but I need to get some local useful information about my lab, I can use a VPN to connect with my lab.
Some very great VPN, doujia VPN, soper. Etc. We can use tracert to get my routing.
DDoS(Distributed Denial-of-Service Attack)
DDoS
In computing, a denial-of-service attack (DoS attack) is a cyber-attack where the perpetrator seeks to make a machine or network resource unavailable to its intended users, such as to temporarily or indefinitely interrupt or suspend services of a host connected to the Internet. Denial of service is typically accomplished by flooding the targeted machine or resource with superfluous requests in an attempt to overload systems and prevent some or all legitimate requests from being fulfilled.
As NAP(Network Access Protection) is the most dangerous part of a computer, DDoS tends to happened at NAP.
IETF–RFC
IETF is an organization who formulate the standard of web. RFC is the profile which contains all what you need about web.
There are three levels about company, Product –> Service –> Company
Input delay(latency)
When you use QQ to connect with another one, the period between when you sent your message and when they convert to the cable is what we called Input delay.
Tasks:
1. build my own server and connect with my website: www.williamyi.tech
2. Finish the papers that is needed in the lab
3. Finish the first Stanford tutorial about CNN and the basic information about DP
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