Do you know about the nouns of CDN?

Abstract: What are the common nouns about CDN? Here are some basic nouns. If you have anything to add, please leave a message below.

Origin Server

is the real server of the client before the CDN.

User

visitors are netizens who want to visit the website.

Last Mile
is the last mile, that is, the path between a netizen and the CDN server he visits.

Domain

Name Domain name is the name of a server or a network system on the Internet network, and there is no duplicate domain name in the whole world.

CNAME record

It is an alias record ( Canonical Name ); when the DNS system queries the name on the left side of the CNAME, it will turn to the name on the right side of the CNAME to perform the query until the last PTR or A name. respond, otherwise fail.

CNAME domain name

CDN domain name acceleration requires the use of CNAME records. After the CDN acceleration is configured in the Alibaba Cloud console, you will get an accelerated domain name, which is called a CNAME domain name (the domain name must be *.*kunlun.com), After users need to use their own domain name as a CNAME to point to the *.*kunlun.com domain name, the domain name resolution work will officially turn to Alibaba Cloud, and all requests for this domain name will be sent to the Alibaba Cloud CDN node.

DNS

DNS stands for Domain Name System, which means domain name resolution service. Its role in the Internet is to convert the domain name into an ip address that the network can recognize. People are accustomed to memorizing domain names, but machines only recognize each other’s IP addresses. There is a one-to-one correspondence between domain names and IP addresses. The conversion between them is called domain name resolution. Domain name resolution needs to be completed by a special domain name resolution server. The process is automatic.

For example: www.baidu.com entered when surfing the Internet will be automatically converted into 220.181.112.143

edge node,

also known as CDN node, Cache node, etc.; it is a concept proposed relative to the complex structure of the network, which refers to the relatively long distance from the end user access. Network nodes with few intermediate links have better responsiveness and connection speed for final access users. Its function is to save the web content and objects with a large number of visits on the dedicated cache device in front of the server, so as to improve the speed and quality of website access.

cache

cache A special memory subsystem in which frequently used data is copied to facilitate fast access. The memory cache stores the contents of frequently accessed RAM locations and the storage addresses of these data items. When the processor references an address in memory, the cache checks to see if that address exists. If the address is stored, the data is returned to the processor; if the address is not stored, a regular memory access is made. Because the cache memory is always faster than the main RAM memory, it is often used when the access speed of the RAM is lower than the speed of the microprocessor.

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