Cats block system to find [Vincent: 191 micro-electric 5743 0732], block software system cat, cat app system blocks, block software app cat, cat pattern similar Walden block
Cats block system to find which company?
There are many software companies do, a lot of companies can block cats, mainly to see if you have any requirements on the company.
Local block Cat What?
Many customers find the company's priority is to consider local companies. Local companies do would be more convenient and easier to communicate. But now well-developed transportation network developed era, distance is not a problem, I think more companies should consider the strength, professionalism, technical, company teams, post services. Everyone operating system platform platform first is to ensure that there is no problem, the problem can be solved in time. I think this is every cat wants to block system customers should consider things, like block system cat: 191-5743! = 0732.
CDN concept
CDN full name is called "Content Delivery Network", Chinese called content delivery networks .
The concept is actually CDN in 1996 by a team from Massachusetts Institute of Technology to improve the quality of Internet service proposed. So in the end it is how to improve the quality of the Internet service it?
Principle Analysis
We know that when we visit a Web site using the domain name, in fact, the request packet (at Http request, for example) transmitted over the network to a server, such as access to "www.baidu.com" when:
- First, parsing the domain name corresponding to the IP addresses (DNS name resolution)
- Http request packet is then routed through the network server to the IP address corresponding to the
We usually say "IP address of the server", which is actually not very accurate, and the IP address is the NIC teaming, a server can have multiple network cards, which is likely to have multiple IP addresses.
Let's look at the first step: DNS