Question

1.which
operating system allows many users to access a single computer
​

Answer 1

Answer:

any desk apk allows to operate ur computer on any other desktop

Answer 2

Answer:

A multi-user operating system (OS) is a computer system that allows multiple users that are on different computers to access a single system's OS resources simultaneously, as shown in this figure appearing on your screen right now. Users on the system are connected through a network. The OS shares resources between users, depending on what type of resources the users need. The OS must ensure that the system stays well-balanced in resources to meet each user's needs and not affect other users who are connected. Some examples of a multi-user OS are Unix, Virtual Memory System (VMS) and mainframe OS.

Figure 1 - Multi-user OS Handling Three Different Computers on the Network

Multi-user operating systems were originally used for time-sharing and batch processing on mainframe computers. These types of systems are still in use today by large companies, universities, and government agencies, and are usually used in servers, such as the Ubuntu Server edition (18.04.1 LTS) or Windows Server 2016. The server allows multiple users to access the same OS and share the hardware and the kernel, performing tasks for each user concurrently.

Multi-User Operating System Security

Since multi-user OS have several users accessing the system resources simultaneously, it's very important for the system administrators to implement security features within the system. These features could include account separation, user groups, roles, and permissions.

Account separation is one of the most important security features that needs to be implemented. This is vital in order to maintain file and content protection, integrity and privacy. Each user must have their own separate account, giving them private work and storage space within the system. Also, user groups, roles, and permissions should be created and assigned to each user to ensure others do not interfere with or delete other users' work, purposefully or accidentally.

A user group is a group of users or people that have similar interests or jobs with access to the specific information they might need. A role is defined as an assignment of rights and rules that a user is assigned by the administrator or superuser. Permissions involve the authorization of a user to access specific resources or files on a particular computer system or network.