Explain in detail the differences between a distributed OS and a network OS

The differences between a network operating system and a distributed operating system are:

1) Distribution. The processing and control functions of a distributed operating system are distributed; Although the network operating system has distributed processing functions, its control functions are concentrated in one or some hosts or network servers, that is, centralized control mode.

2) Parallelism. The distributed operating system has a task allocation function, which can distribute multiple tasks to multiple processing units, so that these tasks are executed in parallel, thereby accelerating the execution of tasks; Network operating systems, on the other hand, usually do not have task assignment capabilities, and one or more tasks for each user in the network are usually processed on the local computer.

3) Transparency. Distributed operating systems often do a good job of hiding the implementation details inside the system. Aspects such as the physical location of objects, concurrency control, and system failures are transparent to the user.

For example, when a user wants to access a file, they can access it by simply providing the file name without knowing (to whom they are accessing) that it resides on that site, that is, it has the transparency of the physical location. The transparency of the network operating system mainly refers to the transparency of the operation implementation. For example, when a user wants to access a file on a server, they simply issue the appropriate file access command without having to know how access to the file is implemented.

4) Shareability. The distributed operating system supports the shared and transparent access of software and hardware resources distributed across various sites by all users in the system. However, the resource sharing function provided by the network operating system is limited to the resources in the host or network server, and the resources on other machines are usually exclusive to the user who uses the machine.

5) Robustness. Distributed operating systems have good availability and reliability due to the distribution of processing and control functions, i.e., robustness. However, due to the centralized characteristics of the control function, the network operating system has a weak system reconstruction function and has potential unreliability.

1. Network operating system.

With the informatization of society, computer technology, communication technology and information processing technology have flourished, giving rise to the concept of computer information network, and the physical basis of information network is computer network.

The definition of a computer network is given explicitly in Chapter 3. An important part of the network system software is the network operating system, some people also call it the network management system, it is different from the traditional stand-alone operating system, it is an open software system built on the stand-alone operating system, it is faced with the interconnection operation of various different computer systems, in the face of resource sharing between different stand-alone operating systems, user operation coordination and interaction with stand-alone operating systems, so as to solve the problem of multiple network users (even the global remote network with two distributed operating systems.

A large number of computers are connected together through the network, which can obtain extremely high computing power and extensive data sharing. Such systems are called distributed systems. The characteristics of a distributed operating system are as follows.

1.Unity.

i.e. it is a unified operating system.

2.Shareability.

That is, all resources in a distributed system are shared.

3.Transparency.

The implication is that the user does not know that the distributed system is running on multiple computers, and that many computers in the entire distributed system are like one computer in the eyes of the user, and that they are transparent to the user.

4.Independence.

That is, multiple hosts in a distributed system are on an equal footing and physically independent.

The advantage of a distributed system is that it is distributed. Distributed systems can achieve high computing performance at a lower cost. Another advantage of a distributed system is its reliability.

Since there are multiple independent CPU systems, if one CPU system fails, the entire system will still work. For highly reliable environments, such as nuclear power plants, distributed systems have a place to play.

The main conceptual difference between the network operating system and the distributed operating system is that the network operating system can be built on different operating systems, that is to say, it can realize the unified configuration of network resources through network protocols on different native operating systems, and constitute a network operating system in a large range. The network operating system does not require transparent access to network resources, that is, the location and type of resources need to be specified, and local resources and remote resource access are treated differently. Distributed emphasizes unity, which is architected by an operating system.

In this operating system, the concept of networking is diluted at the application layer. All resources (local and off-site) are managed and accessed in the same way, and users don't have to care about where they are or how they're stored.

The network operating system is a system software that serves the computer network and completes the communication, resource sharing, network management and security management of the network in accordance with various protocols of the network architecture.

A distributed operating system is an operating system that is built on top of the network operating system and shields the distribution of system resources to users.

For example, depending on their profession or the industry they work in, it's simple, and they can understand it.

Concise explanations, analogous ways

The operating system is only an operating platform, and only with operating software can it run on it.

Literally, it already speaks for itself.