IDC, the Internet Data Center, refers to a service platform with complete equipment (including high-speed Internet access bandwidth, high-performance LAN, safe and reliable computer room environment, etc.), professional management, and complete applications. On the basis of this platform, IDC service providers provide customers with Internet basic platform services (server hosting, virtual host, mail caching, virtual mail, etc.) and various value-added services (site rental services, domain name system services, load balancing systems, database systems, data backup services, etc.).

At present, the basic knowledge content of IDC found online is quite messy. Today, Da Wan Data specially collected and summarized an article on IDC basic knowledge, hoping to be helpful to everyone. 1. International domain names (com domain name is preferred) are generally used for com, government, edu education, and non-profit organizations such as org; Net representsOn the internet, businesses usually choose com, cn, net, or cc, but there is no mandatory rule on which suffix websites should use (excluding gov).

There are also some domain name suffixes that are only marks of a country, and can be accessed as long as the Internet connection is connected to the domain name; For example, when we look at domain names such as wt. hk,. kr, and. jp, as long as the language display supports identical access, the com domain name is still the first choice. After all, the use of com domain names is the earliest and most widespread. For a website based company, it is best to choose a com domain name. However, it is precisely for this reason that the resources of com domain names are already used up, and it is difficult to find a satisfactory domain name.

In the absence of other options, you can choose. net \. me \. cc \ The popular international domain names such as biz \. name, as an alternative to. com, are represented by the name chosen by the registration authority plus the top-levelType, international domain names end with. com,. net, or. org, etc.

2. The suffix of domestic domain names usually includes two parts: “international common domain” and “national domain”, and “national domain” should be used as the last suffix according to ISO31660 standards. Each country has its own fixed national domain, such as: cn representing China, us representing the United States, uk representing the United Kingdom, etc. You can choose a three-level domain name suitable for your organization’s use according to the nature of your organization.

Administrative domain names are divided according to the various administrative divisions in China, and their division standards are determined by the national standards issued by the former State Administration of Technical Supervision, including 34 “administrative domain names”. The expression of domestic domain names applicable to various provinces, autonomous regions, and municipalities in China is the name selected by the registration authority, the top-level type, and the national domain. Domestic domain names are represented by

http://com.cn Or http://net.cn

2、 What is the difference between speed and bandwidth? Speed and bandwidth correspond to each other, and the more visitors can be provided at a certain bandwidth value, the speed will decrease as the number of visitors increases. For example, a 100M bandwidth and a 10M bandwidth can be used. If the user is a 2M ADSL, regardless of which speed is used, it will be the same. If there are 100 such users, then a 100M bandwidth can meet the application, while a 10M bandwidth can only be satisfied at the cost of sacrificing speed.

3、 What is the difference between traffic and bandwidth? Bandwidth refers to the amount of data that can be transmitted at a fixed time, that is, in the transmission pipelineThe ability to transmit data is usually represented in bps in digital devices. Traffic refers to the amount of data exchanged with the outside world within a fixed time, which flows into the server and into the server. For example, visiting a website is a state of server outflow, while uploading photos is a state of inflow.

http://baidu.com It’s easy to remember, it’s both concise and meaningful. What do 5U, 1U, 2U, and 4U represent? In IDC, it is mainly used to measure servicesThe unit of measurement for machine height, u (abbreviation for unit), is a unit that represents the external dimensions of a modular rack, and the detailed dimensions are determined by the Electronic Industry Association (eia) of the United States, which is an industry group.

The specified dimensions are width (48.26cm=19 inches) and height (a multiple of 4.445cm). Due to the width being 19 inches, racks that meet this requirement are sometimes referred to as “19 inch racks”. The thickness is based on 4.445cm, with 1u being 4.445cm, 2u being twice 1u being 8.89cm (and so on).

U is not a patent for servers. It was originally used as a rack structure for communication and exchange. The rack referenced to servers is currently used as a non-standard standard in rack structures, including specified screw sizes, hole spacing, rail markings, and so on. 6. What is a domain name? A domain name is a computer or computer on the Internet composed of a string of names separated by dotsThe name of the group is used to identify the electronic orientation of the computer during data transmission.

This also means that there are no duplicate domain names around the world. What is a server? A server is a type of computer that runs faster, has higher loads, and is more expensive than regular computers. A server provides computing or application services to other clients in a network, such as PCs, smartphones, ATMs, and even large devices such as train systems.

The server has high-speed CPU computing power, long-term reliable operation, powerful I/O external data throughput, and better performanceScalability depends on the services provided by the server. Generally speaking, servers have the ability to respond to service requests, undertake services, and ensure services. As electronic devices, the internal structure of servers is very complex, but it is not much different from the internal structure of ordinary computers, such as CPU, hard disk, memory, system, system bus, etc.

8、 What is cabinet rental? Cabinet rental, also known as computer room space rental, usually has a height of 42U, while our data center has a height of 48U+8U. Rental services are mainly aimed at large ISP and enterprise users, who usually have sufficient funds and technical strength and only need data center service providers to provide computer room space.

What is IDC for telecommunications resources such as power supply and internet backbone interconnection bandwidth? IDC (Internet Data Center) Internet data center, for example, to improve large-scale, high-quality, safe, reliable, professionalIntegrated server hosting, leasing, wholesale of network bandwidth, and ASP and EC services, reducing operational costs through centralized management, providing high-end data transmission services, and high-speed access services.

What is server hosting in IDC? Server hosting refers to the process of users hosting their servers and related devices in a network data center with complete computer room facilities, high-quality network environment, rich bandwidth resources and operational experience, and the ability to monitor users’ networks and devices in real-time in order to improve website access speed. This enables the system to achieve the goal of safe, reliable, stable, and efficient operation.

The hosted server is maintained by the client themselves or remotely by other authorized personnel, that is, the user purchases server equipment and places it in the IDC room of the local telecommunications, Netcom, or other ISP operator. 11. What is server rental? What is server rental? Server rentalUse means that users rent servers stored in the Internet data center by service providers for Internet business applications, and users do not need to purchase server hardware.

Server rental is generally divided into several types: 1. Cloud server rental. Cloud servers are a host product in the cloud computing service system, which effectively solves the management difficulties and weak business scalability in traditional physical hosts and VPS services. In practical applications, cloud hosts have the ability to scale flexibly.

2. The key technology for renting a virtual host is to run different server programs opened for multiple users on the same hardware and operating system, without interfering with each other, and each user has their own part of the system resources. 3. Physical server rental requires hardware configuration according to their business needs.

The server is configured by IDC service providers for users to rent the host and install corresponding system and application softwareTo achieve exclusive dedicated servers, users can install their own operating system and corresponding application software, and fully manage themselves. 12. What is a virtual host? Virtual hosting, also known as shared web hosting or virtual server, is a method of implementing multi domain services on a single host or cluster of hosts, which can run multiple websites or services.

Virtual hosts are completely independent and can be managed by users themselves. Virtual does not mean that they do not exist, but that space is extended from physical servers. Its hardware system can be based on server clusters, or a single server. Its technology is the technology used by Internet servers to save the cost of server hardware. Virtual host technology is mainly applied to HTTP, FTP, EMAIL and other services, logically dividing one or all of the services of a server into multiple servicesA service unit, manifested externally as multiple servers, thus fully utilizing server hardware resources.

The main purpose is to facilitate memory. 14. What is cabinet power consumption? Power consumption unit: kilowatt hour (KW ∙ H), abbreviated as “degree”. Power (P) unit: watt, abbreviated as watt (W). Current (I) unit: ampere, abbreviated as ampere (A)

Voltage (U) unit: volts, abbreviated as volts (V). Power (P)=voltage (U) * current (I). The power consumption of a single cabinet is measured in units of current or power. The sum of the current or power generated by each PDU is commonly measured in units of current, such as 10A, 16A, 20A, 32A, and 63A;.

Common units based on power: 3KW, 4.4KW, 5KW, 6KW, 7.2KW, 12KW 15. What are single-phase electricity and three-phase electricity? Single phase electricity is a type of household socket with three holes, one live wire, one neutral wire, and one ground wire. Three phase electricity has two more live wires, and is mainly used for high-power applicationsEquipment.

16、 What is a PDU? PDU (Power Distribution Unit), also known as power distribution socket for cabinets, is a product designed to provide power distribution for electrical equipment installed in cabinets. It has multiple series of specifications with different functions, installation methods, and different plug combinations, and can provide suitable rack mounted power distribution solutions for different power environments.

The application of PDU can make the power distribution in the cabinet more neat, reliable, safe, professional, and aesthetically pleasing, and make the maintenance of the power supply in the cabinet more convenient and reliable. Seventeen, what is fiber loss? The maximum allowable fiber loss is -40DB, but to achieve stable results, it is recommended that the fiber loss should not exceed -25DB.

To achieve fiber optic communication, an important issue is to minimize the loss of optical fibers as much as possible. Fiber loss refers to the loss per unit length of optical fibersAttenuation, measured in dB/km, directly affects the transmission distance or the distance between relay stations. The loss of optical fibers is also related to distance. The average loss of optical fiber lines per kilometer should not exceed 0.3dB, and 10 kilometers is 3dB. No matter how many joints there are in the middle, the loss of joint points should not exceed 0.5dB.

18、 Load balancing is built on the existing network structure and provides a cheap, effective, and transparent method to expand the bandwidth of network devices and servers, increase throughput, strengthen network data processing capabilities, improve network flexibility and availability. Load balancing means that it is distributed across multiple operating units for execution, which means that access traffic can be dispersed to various application servers for access. It can also increase or decrease the number of visits to a certain application server based on weight settings.

19、 The full name of CDNCDN is Content De

It is mainly applicable to site acceleration, on-demand broadcast, live broadcast and other scenarios. For example, edge computing. The octopus has 500 million neurons, of which 350 million are not in the brain, but are placed in tentacles. Each tentacle has an independent nervous system, and each tentacle has its own ideas. The tentacle can also communicate directly around the brain. What the tentacle does, the brain is kept in the dark.

If octopuses develop the electronic entertainment industry, they can really use CG with their heart and feet to play games. edge computing is equivalent to octopuses with their own hands. Some terminal data does not go through the cloud, and edge computing is directly processed in distributed edge chips. It can be said that cloud computing is a supplement and extension of 21. A system cluster is an APP or application, or the server resources required by the system. It can be said that it is a cluster.

22、 Simply put, virtualization is a technology that involves a physical machine virtualizing multiple logical computers through virtualization technology, and one operating system virtualizing multiple operating systems. It distributes the resources of the physical machine among different operating systems.