What does it mean if the website is not connected to the server?

The website is not connected to the server, that is, it is not connected to the relevant server and cannot be logged in, or the other party's server is not open. A server is a type of computer that runs faster, carries a higher load, and is more expensive than a regular computer.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

Not connected to the server means that it is not connected to the relevant server and cannot log in. Or the other party's server is not open. A server is a type of computer that runs faster, carries a higher load, and is more expensive than a regular computer. The server provides computing or application services to other clients in the network (such as PCs, smartphones, terminals such as ATMs, and even large equipment such as train systems).

The server has high-speed CPU computing capabilities, long-term reliable operation, powerful I/O external data throughput capabilities and better scalability. According to the services provided by the server, generally speaking, the server has the ability to respond to service requests, undertake services, and guarantee services.

Extended information:

Observing servers from different angles, you can classify servers in different ways. Let’s discuss the classification of servers from different angles.

1. According to different architectures, servers can be divided into two important categories: IA architecture servers and RISC architecture servers.

This classification standard is mainly based on the different processor architectures used by the two servers. The CPU used by the RISC architecture server is a so-called reduced instruction set processor. The main feature of the reduced instruction set CPU is that it uses fixed-length instructions and uses a pipeline to execute instructions. In this way, the processing of an instruction can be divided into several stages, and the processor settings are different. The processing unit executes different stages of instructions. For example, if instruction processing is divided into three stages, when the Nth instruction is in the third processing stage, the N1th instruction will be in the second processing stage, and the N2th instruction will be in the second processing stage. will be in the first processing stage.

This pipeline processing method of instructions gives the CPU the ability to process instructions in parallel, which enables the processor to process more instructions per unit time. The IA architecture server uses a CISC architecture, which is a complex instruction set architecture. This architecture is characterized by longer instructions, stronger instructions, and more functions that can be executed by a single instruction. In this way, we can increase the number of operations by increasing the number of operations. The unit enables the functions performed by an instruction to be executed simultaneously and in parallel to improve computing power.

The two architectures have been growing in competition with each other for a long time, and both have achieved rapid development. The IA architecture server adopts an open architecture, so it has a large number of hardware and software supporters and has made great progress in recent years.

2. Depending on the size of the server, the server can be divided into workgroup server, department server and enterprise server.

This classification method is a relatively old classification method. It is mainly classified according to the scale of the server application environment. For example, a computer network environment with about ten clients is suitable for using a workgroup server. This kind of classification method is a relatively old classification method. Servers often use one processor, small hard disk capacity, and not very strong network throughput capabilities; a computer network with dozens of clients is suitable for department-level servers. Department-level servers have relatively stronger capabilities and often use two processors. Larger memory and disk capacity, stronger disk I/O and network I/O capabilities, so that this server can have enough processing power to accept the service requirements put forward by the client.

Enterprise-level servers are often in network environments with more than a hundred clients. In order to respond to a large number of service requests, such servers often use 4 processors, have a large number of hard disks and memory, and can To scale further to meet higher demands, and to cope with the large number of accesses, the network speed and disk speed of such a server should also be high.

In order to achieve this requirement, multiple network cards and multiple hard disks are often used for parallel processing. All the above descriptions are very imprecise, and there are many special situations. For example, a network may have many clients, but access to the server may be very few. There is no need for a powerful enterprise-class server. Due to these factors The existence of server makes this server classification method more qualitative than quantitative. That is to say, from the group level to the department level to the enterprise level, the performance of the server is gradually strengthened, and other various characteristics are also gradually strengthened. .

3. According to the different functions of the server, we can divide the server into many categories.

Such as file/print server, which is the earliest type of server. It can perform file storage and printer resource sharing services. , to this day, this kind of server is still widely used in office environments. A database server runs a database system for storing and manipulating data, and provides data query and modification services to connected users. This type of server is also a server widely used in commercial systems.

WEB server, E-MAIL server, NEWS server, PROXY server, these servers are typical INTERNET applications. They can complete the storage and transmission of homepages, email services, news group services, etc. All of the servers mentioned above are more than just a hardware system. They often achieve their specific functions through a combination of hardware and software.

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